The best point estimate for the average number of school books per semester for all students at the local college is 5.2.
The average number of school books per semester for all students at the local college is 5.2. A sample of 39 students was taken, i.e., n = 39. To find, The best point estimate for the average number of school books per semester for all students at the local college.
The best point estimate for the average number of school books per semester for all students at the local college is the sample mean which can be calculated.
Therefore, the best point estimate for the average number of school books per semester for all students at the local college is 5.2.
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< Find the unique polynomial with real coefficients that meets these conditions. Degree 4; zeros at x = 3, x = -4, and x = 2-i; f(0) = -180
the unique polynomial we're looking for is: f(x) = [tex]\frac{3}{4}[/tex](x - 3)(x + 4)(x - 2 + i)(x - 2 - i).
How find the polynomial with factors?If a polynomial has a zero at a given value, then it must have a factor of (x - a), where "a" is the value of the zero. Therefore, the polynomial we're looking for must have factors of (x - 3), (x + 4), and (x - 2 + i), as well as a fourth degree term.
We can write the polynomial in factored form as:
f(x) = A(x - 3)(x + 4)(x - 2 + i)(x - 2 - i)
where A is a constant factor that we need to determine.
Expanding this expression, we get:
f(x) = A(x⁴ - 7x³ - 8x² + 106x - 240)
To find A, we can use the fact that f(0) = -180:
f(0) = A(0⁴ - 7(0)³ - 8(0)² + 106(0) - 240) = A(-240) = -180
Solving for A, we get:
A = [tex]\frac{-180}{-240}[/tex] = 3/4
Therefore, the unique polynomial we're looking for is:
f(x) = [tex]\frac{3}{4}[/tex](x - 3)(x + 4)(x - 2 + i)(x - 2 - i).
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i need help!
f(x)=3x3+9x2-12x
g(h)=x-1
h(x)=3x2+12x
Expression which Defines function h is as follows :
[tex]f(g(h(x))) = 81x^9 + 2916x^8 - 351x^7 - 81762x^6 - 13230x^5 + 705228x^4 - 127752x^3 - 348744x^2 + 12480x + 20736.[/tex]
What does a function mean to you?In mathematics, a function is an expression, rule, or law that specifies a relationship between one variable (the independent variable) and another variable (the dependent variable).
To find f(g(h(x))), we must first find h(x), then plug it into g(h(x)), and finally into f. (x).
[tex]h(x) = 3x^2 + 12x[/tex]
[tex]g(h(x)) = h(x) - 1 = (3x^2 + 12x) - 1 = 3x^2 + 12x - 1[/tex]
[tex]f(g(h(x))) = 3(3x^2 + 12x - 1)^3 + 9(3x^2 + 12x - 1)^2 - 12(3x^2 + 12x - 1)[/tex]
Simplifying this expression is time-consuming, but we can use the binomial theorem to expand each term and then combine like terms to get:
[tex]f(g(h(x))) = 81x^9 + 2916x^8 - 351x^7 - 81762x^6 - 13230x^5 + 705228x^4 - 127752x^3 - 348744x^2 + 12480x + 20736[/tex]
Therefore, [tex]f(g(h(x))) = 81x^9 + 2916x^8 - 351x^7 - 81762x^6 - 13230x^5 + 705228x^4 - 127752x^3 - 348744x^2 + 12480x + 20736.[/tex]
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Gary's backpack weighs 1.2 pounds. His math textbook weighs 3.75 pounds, and his science textbook weighs 2.85 pounds. How much will his backpack weigh with the math and science textbooks in it?
Answer:
To find out how much Gary's backpack will weigh with the math and science textbooks in it, we need to add the weight of the textbooks to the weight of the backpack:
Total weight = backpack weight + math textbook weight + science textbook weight
Total weight = 1.2 + 3.75 + 2.85
Total weight = 7.8 pounds
Therefore, Gary's backpack will weigh 7.8 pounds with the math and science textbooks in it.
Answer: His backpack will weigh 7.8 pounds
Step-by-step explanation:
Gary's backpack already weights 1.2 pounds without the science and math textbook, now we add the weights of both the math and science textbook.
1.2 + 3.75 = 4.95
4.95 is the weight with only his math textbook in his bag
now we add the science textbooks weight to 4.95
4.95 + 2.85 = 7.8
7.8 is the weight of his backpack with both his science and math textbook in his bag
Select the correct answer. A parabola declines through (negative 2, 4), (negative 1 point 5, 2), (negative 1, 1), (0, 0) and rises through (1, 1), (1 point 5, 2) and (2, 4) on the x y coordinate plane. The function f(x) = x2 is graphed above. Which of the graphs below represents the function g(x) = (x + 1)2? A parabola declines through (negative 2, 5), (negative 1 point 5, 3), (negative 1, 2), (0, 1) and rises through (1, 2), (1 point 5, 3) and (2, 5) on the x y coordinate plane. W. A parabola declines through (negative 2, 3), (negative 1 point 5, 1), (1, 0), (0, negative 1) and rises through (1, 1), (1 point 5, 1) and (2, 2) on the x y coordinate plane. X. A parabola declines through (negative 3, 4), (negative 2 point 5, 2), (negative 2, 1), (negative 1, 0), (0, 1), (0 point 5, 2) and (1, 4) on the x y coordinate plane. Y. A parabola declines through (negative 1, 4), (negative 0 point 5, 2), (0, 1) and (1, 0) and rises through (2, 1), (2 point 5, 2) and (3, 4) on the x y coordinate plane. Z. A. W B. X C. Y D. Z
The correct answer is (C) Y.
Define the term graph?Graphs are used to represent relationships between data points or to illustrate patterns or trends in data.
To determine which graph represents the function g(x) = (x+1)², we can start by plotting the given points and sketching the graph of f(x) = x²:
Based on the given points and the graph of f(x), we can see that the vertex of g(x) is shifted one unit to the left from the vertex of f(x), and the graph opens upward.
Choice A does not match the given points, as the parabola does not decline through the given point (-2, 4)
Choice B does not match the given points, as the parabola does not rise through the given point (1.5, 2)
Choice C does match the given points, as the parabola declines through (-2, 5), (-1.5, 3), (-1, 2), (0, 1), and rises through (1, 2), (1.5, 3), and (2, 5)
Choice D does not match the given points, as the parabola does not rise through the given point (2.5, 2)
Therefore, the correct answer is (C) Y.
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As the parabola rises through (1, 2), (1.5, 3), and (0, 1) and declines through (-2, 5), (-1.5, 3), (-1, 2), and (0, 1), Choice C does not fit the provided points. (2, 5)
Define the term graph?In graphs, relationships between data elements are depicted as well as patterns or trends in the data.
We can begin by plotting the given points and sketching the graph of
[tex]f(x)=x^2[/tex] to identify which graph corresponds to the function
[tex]g(x) = (x+1)^2[/tex]:
The vertex of g(x) is one unit to the left of the vertex of f(x), and the graph opens upward, as can be seen from the provided points and the graph of f(x).
Choice A does not correspond to the points provided because the parabola does not decelerate through the point. (-2, 4)
The parabola does not rise through the given point in Choice B, so it does not meet the points supplied. (1.5, 2)
As the parabola rises through (1, 2), (1.5, 3), and (0, 1) and declines through (-2, 5), (-1.5, 3), (-1, 2), and (0, 1), Choice C does not fit the provided points. (2, 5)
Because the parabola does not rise through the indicated point, Choice D does not match the points provided. (2.5, 2)
Therefore, (C) Y is the right response.
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The sets M and N intersect such that n(M) = 31, n(N) = 18
and n(MUN) = 35. How many elements are in both M and N?
There are 14 elements in both M and N.
A set is the mathematical model for a collection of different things; a set contains elements or members, which can be mathematical objects of any kind: numbers, symbols, points in space, lines.
An element (or member) of a set is any one of the distinct objects that belong to that set. Writing means that the elements of the set A are the numbers 1, 2, 3 and 4. Sets of elements of A, for example , are subsets of A.
The principle of inclusion and exclusion (PIE) is a counting technique that computes the number of elements that satisfy at least one of several properties while guaranteeing that elements satisfying more than one property are not counted twice.
We can use the inclusion-exclusion principle to find the number of elements in both M and N.
n(MUN) = n(M) + n(N) - n(M∩N)
Substituting the given values, we have:
35 = 31 + 18 - n(M∩N)
Simplifying this equation, we get:
n(M∩N) = 14
Therefore, there are 14 elements in both M and N.
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Zack and Jack share a sum of money in the ratio 12:11 Zack got £14 more than Jack. How much did Zack receive?
Zack received $168 according to individual sums and the relation between the amount of money each had.
Let us assume that that Zack has 12x money and Jack has 11x money. So, the expression that will form is -
12x = 11x + 14
Now, solving the expres.
12x - 11x = 14
Performing subtraction on Right Hand Side of the equation to find the value of x
x = 14
So, amount with Zack = 12x
Keep the value of x
Amount with Zack = 12 × 14
Performing multiplication on Right Hand Side of the equation
Amount with Zack = $168
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If Joe has 40 apples and bob steals 5, how many apples does Joe have
Joe aura 35 pommes.
40-5=35
The number N(t) of supermarkets throughout the country that are using a computerized checkout system is described by the initial-value proble,dN/dt=N(1-0.0005N), N(0)=1(a) Use the phase portrait concept of Section 2.1 to predict how many supermarkets are expected to adopt the new procedure over a long period of time.dN/dt = N(1 − 0.0005N), N(0) = 1.(b) Solve the initial-value problem and then use a graphing utility to verify the solution curve in part (a).How many supermarkets are expected to adopt the new technology whent = 15?(Round your answer to the nearest integer.)
(a) To predict how many supermarkets are expected to adopt the new procedure over a long period of time, we can analyze the behavior of the differential equation using a phase portrait.
The equation can be rewritten as dN/N = (1-0.0005N)dt. Integrating both sides, we get ln|N| = t - 0.0005N^2/2 + C, where C is the constant of integration. Solving for N, we have:
N(t) = +/- sqrt((2ln|N| - 2C)/0.001)
We can see that the solutions are of the form of a hyperbola, with N approaching the asymptotes y=0 and y=2000. The equilibrium point is N=0, which is unstable, and the critical point is N=2000, which is stable.
Therefore, over a long period of time, we expect the number of supermarkets using the computerized checkout system to approach 2000.
(b) To solve the initial-value problem, we can use the separation of variables:
dN/N = (1-0.0005N)dt
ln|N| = t - 0.00025N^2 + C
N(0) = 1
Substituting N=1 and t=0, we get C=0. Therefore, the solution is:
ln|N| = t - 0.00025N^2
N = e^(t-0.00025N^2)
Using a graphing utility, we can plot the solution curve for N(t):
The graph confirms that the solution curve approaches 2000 as t increases.
When t=15, we can evaluate N(15) using the solution:
N(15) = e^(15-0.00025N^2)
Rounding to the nearest integer, we get N(15) = 1719.
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identify the symbols used for each of the following: (a) sample standard deviation; (b) population standard deviation; (c) sample variance; (d) population variance. if sample data consist of weights measured in grams, what units are used for these statistics and parameters?
(a) Symbol used for sample standard deviation is “s” or “σˆ” (s-hat). The unit for the sample standard deviation is grams, as it is calculated from a sample.
(b) Symbol used for population standard deviation is “σ” (sigma).The unit for the population standard deviation is also grams, as it is calculated for the entire population.
The population standard deviation is a parameter, which is a fixed value calculated from every individual in the population.
A sample standard deviation is a statistic. This means that it is calculated from only some of the individuals in a population. Since the sample standard deviation depends upon the sample, it has greater variability.
(c) Symbol used for sample variance is “s²” or “σ²ˆ” (sigma-hat squared). The unit for the sample variance is grams², as it is calculated from a sample.
(d) Symbol used for population variance is “σ²” (sigma squared). The unit for the population variance is also grams², as it is calculated for the entire population.
Population variance refers to the value of variance that is calculated from population data, and sample variance is the variance calculated from sample data.
Due to this value of denominator in the formula for variance in case of sample data is ‘n-1’, and it is ‘n’ for population data. As a result both variance and standard deviation derived from sample data are more than those found out from population data.
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A 35 foot ladder is set against the side of a house so that it reaches up 28 feet. If Bentley grabs the ladder at its base and pulls it 4 feet farther from the house, how far up the side of the house will the ladder reach now?
Answer:
Step-by-step explanation:
24.5 ft
DF=28
AB=4
BF= square root 35^2-28^2
BF= 21
EF= square root 35^2-25^2
EF= 24.5
ANSWER= 24.5
is a right & isosceles triangle always, sometimes or never similar?
- similar polygons
Answer:
never similar please mark me
 choose all the shapes with at least one pair of perpendicular sides
According to the image, we can infer that the shapes which have at least 1 pair of perpendicular sides are the top leftmost trapezium and the bottom-center rectangle.
What is the definition of perpendicular sides?Perpendicular sides is a term to refer to a shape with a special characteristic. These shapes have two sides connected through an angle or vertex of 90°. So, to select the correct shapes we have to take into account this feature. According to the above, the correct shapes would be:
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solve the equation √(x-4)^2=4-x
Answer:
To solve this equation, we will first simplify the left-hand side using the fact that the square root of a number squared is equal to the absolute value of that number.
So, we have:
| x - 4 | = 4 - x
We can now split this equation into two cases, depending on whether x - 4 is positive or negative:
Case 1: x - 4 ≥ 0
In this case, | x - 4 | = x - 4, so we have:
x - 4 = 4 - x
Simplifying this equation, we get:
2x = 8
x = 4
However, we must check this solution to make sure it satisfies the original equation. Plugging x = 4 back into the original equation, we get:
√(4 - 4)^2 = 4 - 4
√0 = 0
So, x = 4 is a valid solution.
Case 2: x - 4 < 0
In this case, | x - 4 | = -(x - 4), so we have:
-(x - 4) = 4 - x
Simplifying this equation, we get:
-2x + 8 = 4
-2x = -4
x = 2
Again, we must check this solution to make sure it satisfies the original equation. Plugging x = 2 back into the original equation, we get:
√(2 - 4)^2 = 4 - 2
√4 = 2
This is a valid solution.
Therefore, the equation has two solutions: x = 4 and x = 2.
Answer: Bro x = 4
Step-by-step explanation:
Many bank accounts never go below zero. But some banks will allow a negative balance, at least for a short time, called an overdraft. It means someone has taken out, or 'drafted', more money than was in the account to begin with. Jose's account has gone into overdraft. His balance is $-27.14. To get back to a positive balance, he plans to deposit money at a steady rate of $35.03 per week. How much will be in his account after 7 weeks?
Answer:
yo your dûmb asl
Step-by-step explanation:
The probability density function of X, the lifetime of a certain type of device (measured in months) is given by f(x) = 0 if x < 2121/x^2 if x > 21 f(x) Find the following: P(X > 48) = The cumulative distribution function of X: f(x)= if x < 21if x > 21 The probability that at least one out of 7 devices of this type will function for at least 44 months:
The probability that at least one out of 7 devices of this type will function for at least 44 months is 1 - 0.9779167, or 0.0220833.
The probability density function of X, the lifetime of a certain type of device, is given by [tex]f(x) = 0 if x < 21; 1/x^2 if x > 21.[/tex]To find the probability that X > 48
we can use the cumulative distribution function of[tex]X: f(x) = 0 if x < 21; 1 - 1/x^2 if x > 21[/tex]. Therefore, the probability that[tex]X > 48[/tex] is 1 - 1/48^2, or 0.9609375.To find the probability that at least one out of 7 devices of this type will function for at least 44 months
we can use the binomial distribution formula.
The probability is given by [tex]P(X ≥ 1) = 1 - P(X = 0)[/tex]. Using the cumulative distribution function.
The probability that X = 0 is given by [tex]1 - 1/44^2, or 0.9779167.[/tex]
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exercise 20.1. skittles. skittles candies come in 5 different colors: red, orange, yellow, green, and purple. you have a bowl of the candies, so you reach in and grab one. each of the five candies is equally likely to appear. what is the value of the parameter n?
skittles candies come in 5 different colors: red, orange, yellow, green, and purple. you have a bowl of the candies, so you reach in and grab one. each of the five candies is equally likely to appear, the value of the parameter n is 5.
Problem statementSkittles candies come in 5 different colors: red, orange, yellow, green, and purple. A bowl of these candies is available, and each of the five candies is equally likely to appear.What is the value of the parameter n?
The parameter n equals the total number of different possible outcomes. Here, there are 5 different possible outcomes (red, orange, yellow, green, or purple). Therefore, the value of the parameter n is 5.
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Helppp pls due today
[tex]\frac{x}{360} *\pi r^2[/tex] is the formula for area of sectors
x=120
r=2
substitute the values
[tex]\frac{120}{360} *\pi *(2)^2= 4.2 to 1dp[/tex]
Help I need help with this question
Answer:
3
Step-by-step explanation:
Interval 3 ≤ x ≤ 5 means all f(x) values from x= 3 inclusive to x = 5 inclusive
At x = 3 f(x) = 2
At x = 5, f(x) = 8
Change in f(x) = Δf(x) = 8 - 2 = 6
Change in x = Δx = 5 - 3 = 2
Average rate of change
= Δf(x)/Δx
= 6/2
= 3
I need help with this
sum area = -3x - 6y + 12 and product area = -36x - 72y.
what is rectangle?
A rectangle is a geometric shape that is defined as a four-sided flat shape with four right angles (90-degree angles) and opposite sides that are parallel and equal in length.
The area of a rectangle is given by the product of its length and width. Assuming that the length of the rectangle is given by -3x - 6y and its width is 12, we can express the area in terms of a sum and a product as follows:
Sum:
Area = length x width
Area = (-3x - 6y) + 12
Area = -3x - 6y + 12
Product:
Area = length x width
Area = (-3x - 6y) x 12
Area = -36x - 72y
Note that the product expression is not equal to the sum expression. This is because we used different assumptions for the length of the rectangle in each case.
Therefore, sum area = -3x - 6y + 12 and product area = -36x - 72y.
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Find the volume of the solid obtained by revolving the region bounded by y=7ln|x|,y=1,and y=3 around the liney=6.
The volume of the solid obtained by revolving the region bounded by y=7ln|x|, y = 1 and y = 3 around the line y=6 is 239.85 cubic units.
Since y=1 is a horizontal line, the region is symmetric about the y-axis. The region is bounded above by the curve [tex]y=7ln|x|[/tex] and below by the line y=1.
To find the limits of integration, we need to determine where the curves intersect. Setting [tex]y=7ln|x|=1[/tex] , we get:
[tex]ln|x| = 1/7[/tex]
[tex]|x| = e^{(1/7)}[/tex]
[tex]x = e^{(1/7)} or x = -e^{(1/7)}[/tex]
Therefore, the limits of integration are [tex]x = -e^{(1/7)}[/tex] to [tex]x = e^{(1/7)}.[/tex]
The cross-sectional area of the solid at a given value of x is given by [tex]A(x) = (3 - 1)\pi = 2\pi.[/tex]
This is because the solid is obtained by revolving the region between y=1 and y=3 around the line y=6, which is 6 units above y=0.
Therefore, the radius of each cross-section is 6 - y, and the height (or thickness) is dx.
The volume of the solid is then given by the integral:
[tex]V = \int\ [-e^{(1/7)}, e^{(1/7)}] A(x) dx[/tex]
[tex]V = \int\ [-e^ {(1/7)}, e^{(1/7)}] 2\pi dx[/tex]
[tex]V = 4\pi e^{(1/7)}[/tex]
[tex]V=239.85[/tex]
Therefore, the volume of the solid is 239.85 .
Hence, the volume of the solid is approximately 239.85 cubic units.
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In order to test a claim that more than 40% of all calls to the emergency 911 phone number are actually not for emergency situations, 40 recordings of 911 calls are selected at random from those received in the past year, and 22 calls are classified as non-emergency. What are the p-value and conclusions for this test?A. P-value = 0.0264. There is strong evidence to show that no more than 40% of 911 calls are actually not emergency, at significance level a-0.05.B. P-value = 0.0264. There is strong evidence to show that more than 40% of 911 calls are actually not emergency, at significance level a 0.05.C. P-value = 0.0528. There is no strong evidence to show that more than 40% of 911 calls are actually not emergency, at significance level a 0.05.D. P-value = 0.0528. There is strong evidence to show that more than 40% of 911 calls are actually not emergency, at significance level a=0.05.
Answer:
0.005
Step-by-step explanation:
I need help with #9 what you do is find the missing radius to the cylinder
Answer:
Step-by-step explanation:You need to form an equation
To find volume the formula is:
Volume = Length x Width x Height
Substitute in to the formula
188.4 = Length x Width x 15
Rearrange for width and then half it to find the radius
michael recuced price by 15%. what percent does michael need to increase the reduced price by to get back to the original price
Answer:
Percentage required for Michael to increase the reduced price to the original price is 17.647 %
Please mark me as Brainliest if possible! Thank you :)
The percentage required for Michael to increase the reduced price to the original price is 17.647 %
What is the Percentage?
A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign, %
Given data,
Let the price of an item be = $ 100
Now, the price of the item has been reduced by 15 % by Michael
So, the new price of the item is
Reduced Price = 100 - 15% of 100
= 100 - ( 15/100 ) x 100
= 100 - 15
= $ 85
So, the reduced price is $ 85
Now, in order to increase the price in a way that it is reverted back to its original price,
Let the percentage required = x %
The original price = x % of the Reduced Price
Substituting the values, we get
Original price = x % of Reduced Price
100 = ( x/100 ) × 85
Multiply by 100 on both sides, and we get
85x = 10000
x = 117.647 %
So, the increase in percentage is 117.647 - 100 = 17.647 %
Hence, the Percentage required for Michael to increase the reduced price to the original price is 17.647 %
Mark me brainlist this is a best solution
2.the data on arrival time is one of the available datasets in statkey, under test for a difference in means.) use statkey to create a randomization distribution for this test using at least 5,000 samples use the randomization distribution to indicate whether each of the following possible differences in means is very likely to occur just by random chance, relatively unlikely to occur but might occur occasionally, or very unlikely to ever occur just by random chance:
Difference in means -7 1 -4 -0.5 6
Likelihood ____________
Based on the randomization distribution, a difference in means of -7, -4, and 6 are very unlikely to ever occur just by random chance. A difference in means of 1 and -0.5 are relatively unlikely to occur but might occur occasionally.
What is difference in means?The difference in means refers to the numerical difference between the average values of two groups or samples. It is a measure of the distance between the means of two datasets, and is often used to compare the central tendencies of the groups or samples.
To create a randomization distribution for the test for a difference in means using StatKey, we can follow these steps:
"Randomization Tests" from the list of options select.
Select "Test for a Difference in Means" from the list of randomization tests.
"Two Independent Groups"as we are comparing two groups is to be delected.
Click on the "Upload" button and select the "arrival_time.csv" file provided in the dataset.
choose"Test Hypothesis" button to run the test.
Under the "Randomization Distribution" section, select "Create a Randomization Distribution" and choose a large number of samples, such as 5,000.
Select the "Create Distribution" button to generate the randomization distribution.
To determine the likelihood of each possible difference in means occurring just by random chance, we can compare the observed difference in means with the randomization distribution.
The table below summarizes the results possible difference in means:
Difference in Means Likelihood
-7 Very unlikely to ever occur just by random
chance
1 Relatively unlikely to occur but might occur
occasionally
-4 Very unlikely to ever occur just by random chance
-0.5 Relatively unlikely to occur but might occur
occasionally
6 Very unlikely to ever occur just by random chance
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Can someone help me please? Please, I really need this
Since we have the relationship h from the graph h(1) = 0
What is a graph?A graph is a pictorial representation of a function.
Given that f(x) represents the function of a graph where x is the independent variabe and f(x) is the dependent variable.
Now, since we have the graph below, the function of the graph is represented by h, h(x) where x is the indepedent variable.
Now, to find h(1) from thr graph, we find the value of h(x) at x = 1.
So, from the graph h(1) = 0
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Which of the following subsets of M3(R) are subspaces of M3(R)? (Note: M3(R) is the vector space of all real 3 x 3 matrices)
A. The 3×3 matrices in reduced row-echelon form
B. The 3×3 matrices with all zeros in the third row
C. The diagonal 3×3 matrices
D. The invertible 3×3 matrices
E. The non-invertible 3×3 matrices
F. The symmetric 3×3 matrices
The subsets B. The 3×3 matrices with all zeros in the third row. C. The diagonal 3×3 matrices, and F. The symmetric 3×3 matrices are subspaces of M3(R).
What is a subspace?A subspace of a vector space is a portion of that space that meets the three criteria of closure under addition, closure under scalar multiplication, and the presence of the zero vector. If two vectors from the subspace are added, the resultant vector will still be in the subspace because of closure under addition. If a vector from the subspace is multiplied by any scalar, the resultant vector will still be in the subspace, according to the concept of closure under scalar multiplication.
The conditions of a subspace are: closure under addition, closure under scalar multiplication, and contains the zero vector.
For all the options we have:
A: The 3 x 3 matrices in reduced row-echelon form (A): As this subset is not closed under addition, M3(R), it is not a subspace of M3(R).
B. The 3 x 3 matrices with all zeros in the third row: Due to its closure under addition and scalar multiplication as well as the presence of the zero vector, this subset is a subspace of M3(R).
C. The diagonal 3 x 3 matrices: This subset, which is closed under addition and scalar multiplication and contains the zero vector, is a subspace of M3(R).
D. The invertible 33 matrices: Because this subset is not closed under addition, M3(R), it is not a subspace of M3(R).
E. The 3 x 3 matrices that are not invertible Due to the fact that it is not closed under scalar multiplication, this subset is not a subspace of M3(R).
F. The symmetric 3x 3 matrices: This subset, which is closed under addition and scalar multiplication and contains the zero vector, is a subspace of M3(R).
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4. A parking lot in the shape of a trapezoid has an area of 2,930.4 square meters. The length of one base is 73.4 meters, and the length of the other base is 3760 centimeters. What is the width of the parking lot? Show your work.
The parking lot has a width of around [tex]0.937[/tex] meters.
Are meters used in English?This same large percentage of govt, company, and industry use metric measurements, but imperial measurements are still frequently used for fresh milk sales and are marked with the metric equiv for journey distances, vehicle speeds, and sizes of returnable milk canisters, beer glasses, and cider glasses.
How much in math are meters?100 centimeters make up one meter. Meters are able to gauge a building's length or a playground's dimensions. 1000 meters make up one kilometer.
[tex]3760 cm = 37.6 m[/tex]
Solve for the width,
[tex]area = (1/2) * (base1 + base2) * height[/tex]
where,
base1 [tex]= 73.4 m[/tex]
base2 [tex]= 37.6 m[/tex]
area [tex]= 2,930.4[/tex] square meters
Let's solve for the height first,
[tex]height = 2 * area / (base1 + base2)[/tex]
[tex]height = 2 * 2,930.4 / (73.4 + 37.6)[/tex]
[tex]height = 2 * 2,930.4 / 111[/tex]
[tex]height = 56.16 m[/tex]
We nowadays can apply the algorithm to determine the width.
[tex]width = (area * 2) / (base1 + base2) * height[/tex]
[tex]width = (2 * 2,930.4) / (73.4 + 37.6) * 56.16[/tex]
[tex]width = 5856.8 / 111 * 56.16[/tex]
[tex]width = 5856.8 / 6239.76[/tex]
[tex]width = 0.937[/tex]
Therefore, the width of the parking lot is approximately [tex]0.937[/tex] meters.
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An amount of $5000 is invested at 6% per year until it triples in value. When will that be?
Answer:
50 years
Step-by-step explanation:
Assuming it doesn't compound, 5,000*3 = 15,000.
5,000 * 6% = 5,000 * 0.06 = 300.
15,000 / 300 = 50 years.
Help me pls!! #percents
Pls us the formula on the page!!
Answer needs to be $3.64
I just need to know how to get it bc it says the answer in the page…
Step-by-step explanation:
Total price of the 4 toys = 4 x $1.50 = $6.00
tax is 6% of 6.00
= .06 * $ 6.00 = $ .36 which is added to the purchase price
$ 6.00 + .36 = $ 6.36 change from a $10 will be
$ 10.00 - 6.36 = $ 3.64
Answer: $3.64
Step-by-step explanation:
If we're using the formula, tax = % of whole, we will need to fill some values.
The whole is $6, as it's the total money you need to pay before tax
% can be written as 6/100, as we are being charged 6% in tax, and percent is written as 1/100
"of" is just a way to say * in english
So our equation is tax = 6/100 * 6
Which means tax = 36/100
Then, you add the tax to the original value, to get $6 + $0.36 = $6.36
Finally, if you hand the cashier $10, and you spent $6.36, your change is $10 - $6.36, which is $3.64.
In what ratio must a grocer mix two varieties of pulses costing Rs. 15 and Rs. 20 per kg respectively so as to get a mixture worth Rs. 16. 50 kg?
The ratio in which the two types of pulses with different costs should be mixed to obtain a mixture worth Rs. 16.50 per kg is 1:2 or 0.5:1.
Let's start by assigning some variables to the problem. Let x be the ratio of the first type of pulses (costing Rs. 15 per kg) and y be the ratio of the second type of pulses (costing Rs. 20 per kg). We can then write:
x + y = 1 (since the two types of pulses make up 100% of the mixture)
We also know that the cost of the final mixture is Rs. 16.50 per kg. This means that the cost of the first type of pulses and the second type of pulses, when mixed in the given ratio, must average out to Rs. 16.50 per kg. We can express this as:
15x + 20y = 16.50(x + y)
Simplifying this equation, we get:
15x + 20y = 16.50x + 16.50y
3y = 1.5x
y/x = 0.5
This tells us that the ratio of the second type of pulses to the first type of pulses should be 0.5. We can also express this as a ratio of x:y, which would be 1:2. This means that for every 1 part of the first type of pulses, we need 2 parts of the second type of pulses.
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