Using the z-distribution, the z-statistic would be given as follows:
c) z = -2.63.
What are the hypothesis tested?At the null hypothesis we test if the means are equal, hence:
[tex]H_0: \mu_D - \mu_C = 0[/tex]
At the alternative hypothesis, it is tested if they are different, hence:
[tex]H_1: \mu_D - \mu_C \neq 0[/tex]
What are the mean and the standard error for the distribution of differences?For each sample, they are given as follows:
[tex]\mu_D = 12, s_D = \frac{5.2}{\sqrt{73}} = 0.6086[/tex][tex]\mu_C = 14, s_C = \frac{4.1}{\sqrt{81}} = 0.4556[/tex]Hence, for the distribution of differences, they are given by:
[tex]\overline{x} = 12 - 14 = -2[/tex].[tex]s = \sqrt{0.6086^2 + 0.4556^2} = 0.76[/tex]What is the test statistic?The test statistic is given by:
[tex]z = \frac{\overline{x} - \mu}{s}[/tex]
In which [tex]\mu = 0[/tex] is the value tested at the null hypothesis.
Hence:
[tex]z = \frac{\overline{x} - \mu}{s}[/tex]
[tex]z = \frac{-2 - 0}{0.76}[/tex]
z = -2.63.
Hence option B is correct.
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hello, i need help with my math money management math homework but no one wants to help me please help me with my math homework!!
a) The total cost of purchasing the car with the harmonized sales tax (HST) is $36,160.
b) If the customer leases the car instead of buying it, they will save $14,760.
c) After the customer returns the leased car, their lease options include:
Lease buyoutExtending the leaseSigning a new lease agreementBuying out the car and then reselling it.What is a lease?A lease is a financing arrangement for capital assets, that enables the lessee to use the asset for a determined period while making periodic payments to the lessor.
Leases are classified into operating and finance (capital) leases.
Value of the car = $32,000
Harmonized Sales Tax (HST) = 13%
Cost of the car with HST = $36,160 ($32,000 x 1.13)
Under Lease:Down payment = $1,000
Financing part = $35,160 ($36,160 - $1,000)
Installment payments = 48
Periodic payments = $425
Total lease cost = $21,400 ($1,000 + 48 x $425)
Savings from leasing = $14,760 ($36,160 - $21,400)
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if AT= 4x-7 and CT = -x + 13, solv e for x
At Park Junior High, 10%, or 160, of the students, play a musical instrument. How many students attend the school?
A tape diagram. StartFraction part Over whole EndFraction = StartFraction 10 Over 100 EndFraction = StartFraction 160 Over question mark EndFraction
Which statements are correct? Check all that apply.
The total number of students is < 160.
The total number of students is > 160.
The percent as a part-to-whole ratio is StartFraction 10 Over 100 EndFraction.
The percent as a part-to-whole ratio is StartFraction 160 Over 100 EndFraction
There are 1,600 students in the school.
There are 250 students in the school.
The statements that are correct include the following:
B. The total number of students is > 160.
C. The percent as a part-to-whole ratio is 16/100.
E. There are 1600 students in the school.
What is a percentage?In Mathematics, a percentage can be defined as any number that is expressed as a fraction of hundred (100). This ultimately implies that, a percentage indicates the hundredth parts of any given number.
For the total number of students, we have:
Total number of students = 10/100 × T = 160
0.1T = 160
T = 160/0.1
T = 1,600 students.
Note: Percentage as a part-to-whole ratio is 10/100.
In conclusion, we can reasonably infer and logically deduce that the total number of students at Park Junior High is equal to 1,600 students.
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Complete Question:
At park junior high 10% or 160 of the students play a musical instrument how many students attended the school?
Which statements are correct? check all that apply.
A.the total number of students is 160
B. The total number of students is > 160.
C.The percent as a part-to-whole ratio is 10/100
D.the percent as a part to whole ratio is 160/100
E.there are 1600 students in the school
F.there are 250 students in the school.
yall better help me this is 45 points for one question if ya get it right u get brainliest too.(:
The value of B, the area of the base, is 1,540 m^2.
What is value?Value is the relative worth, merit, or importance of something. It can refer to an intangible concept such as a person's principles or a tangible object such as a rare coin. Values vary widely across cultures, societies, and individuals, and can even vary within the same individual over time. Value is often used to describe the worth of something in terms of its usefulness, beauty, or desirability. Value can also refer to the moral or ethical standards of a person or group.
The area of the base can be found by using the formula A = V/h where A is the area of the base, V is the volume, and h is the height. In this case, A = 26,214 / 17 = 1,540 m^2. Therefore, the value of B, the area of the base, is 1,540 m^2.
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The question is in the screenshot below. TIA
Answer: 3c+3
Step-by-step explanation:
NO LINKS!!
a. Identify each sequence as arithmetic, geometric, or neither
b. If it is arithmetic or geometric, describe the sequence generator
n t(n)
0 16
1 9
2 4
3 1
4 0
5 1
6 4
Answer:
a) Neither,b) t(n) = (n - 4)²--------------------------------------
We observe that, the sequence is symmetric and all the terms are perfect squares:
16, 9, 4, 1, 0, 1, 4 ⇒ 4², 3², 2², 1², 0², 1², 2²This is neither arithmetic nor geometric.
The zero term is 16 and the fourth term is 0 so the nth term would be:
t(n) = (n - 4)²Answer:
a) Neither
b) t(n) = n² - 8n + 16
Step-by-step explanation:
An Arithmetic Sequence has a constant difference between each consecutive term.
A Geometric Sequence has a constant ratio (multiplier) between each consecutive term.
Part (a)As the sequence has neither a constant difference or a constant ratio, the sequence is neither arithmetic or geometric.
Part (b)Work out the differences between the terms until the differences are the same:
First differences
[tex]16 \underset{-7}{\longrightarrow} 9 \underset{-5}{\longrightarrow} 4 \underset{-3}{\longrightarrow} 1 \underset{-1}{\longrightarrow} 0 \underset{+1}{\longrightarrow} 1 \underset{+3}{\longrightarrow} 4[/tex]
Second differences
[tex]-7 \underset{+2}{\longrightarrow} -5 \underset{+2}{\longrightarrow} -3\underset{+2}{\longrightarrow} -1\underset{+2}{\longrightarrow} 1\underset{+2}{\longrightarrow} 3[/tex]
As the second differences are the same, the sequence is quadratic and will contain an n² term. The coefficient of n² is always half of the second difference. Therefore, the coefficient of n² = 1.
Write out the numbers in the sequence n² and determine the operation that takes n² to the given sequence:
[tex]\begin{array}{|c|c|c|c|c|c|c|c|}\cline{1-8} n&0& 1& 2&3 &4 &5 &6 \\\cline{1-8}n^2 &0& 1& 4& 9&16 & 25&36 \\\cline{1-8} \sf operation&+16& +8&+0&-8&-16&-24&-32\\\cline{1-8} \sf sequence & 16&9 &4 & 1& 0& 1& 4\\\cline{1-8}\end{array}[/tex]
As the operation is not constant, work out the differences between the operations:
[tex]16\underset{-8}{\longrightarrow} 8\underset{-8}{\longrightarrow} 0\underset{-8}{\longrightarrow} -8\underset{-8}{\longrightarrow} -16\underset{-8}{\longrightarrow} -24\underset{-8}{\longrightarrow} -32[/tex]
As the differences are the same, the second operation in the sequence is -8n. Write out the numbers in the sequence with both operations and and determine the operation that takes (n² - 8n) to the given sequence:
[tex]\begin{array}{|c|c|c|c|c|c|c|c|}\cline{1-8} n&0& 1& 2&3 &4 &5 &6 \\\cline{1-8}n^2 -8n&-0&-7&-12&-15&-16&-15&-12\\\cline{1-8}\sf operation &+16&+16&+16&+16&+16&+16&+16\\\cline{1-8} \sf sequence & 16&9 &4 & 1& 0& 1& 4\\\cline{1-8}\end{array}[/tex]
As the operation is constant, the final operation in the sequence is +16.
So the equation for the nth term is:
[tex]\implies t(n)=n^2-8n+16[/tex]
A rectangular piece of metal is 15 in longer than it is wide. Squares with 3 in long are cut from the 4 corners and the flap are folded upward to form an open box. If the volume of the box is 858in^3, what were the original dimensions of the piece of metal?
Note that in the above scenario, the original dimensions of the piece of metal that is rectangular are:
Length: 32 InchesWidth: 15 InchesWhat is the rationale for the above solution?Let x equal the width of the box and x + 15 equal the length of the box.
Subtract 6 (the amount cut out) from both of these to get the following terms: (x+9) and (x-6).
These are the length and width of the box respectively. We also know that the height of the box is 3. Plugging these into the formula for the volume of a box gives you:
3(x+9)(x-6)=858
If the above is expanded, we have:
3x²+9x-162=858
Subtract 858 from both sides to make the quadratic equation equal zero. Plug the a, b and c coefficients into the quadratic formula (or factor) to find x.
3x²+9x-162- 858 = 0
⇒ 3x²+9x -1020= 0
At the stage we solve for x:
3x2+9x−1020 = 0
Factor left side of the equation.
3(x−17)(x+20)=0
Set factors equal to 0.
x−17=0 or x+20=0
x=17 or x=−20
We can't get a negative side, so the answer that makes sense is x =17 recall that the metal is 15 inches longer than its width.
So if the Width is x and the Lenght is x +15
Then Width is 17 while the length is 17 + 15 = 32inces.
Thus the original dimensions of the metal are:
Length: 32 Inches
Width: 15 Inches
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PLEASE HELP, I ATTACHED AN IMAGE OF THE PROBLEM!!!
The correct rule of the transformation is,
⇒ Dilation of 0.5.
What is Translation?A transformation that occurs when a figure is moved from one location to another location without changing its size or shape is called translation.
We have to given that;
The coordinate of CDE are,
⇒ C (4, - 5), D (3, - 1), E (5, - 3)
And, After transformation the coordinate of image C'D'E' are,
⇒ C' (2, - 2.5) , D' (1.5, - 0.5), E' (2.5, - 1.5)
Now, We have;
⇒ C (4, - 5) = C' (2, - 2.5)
Let a dilation of the points = k
So, We can formulate;
⇒ 4 × k = 2
⇒ k = 2/4
⇒ k = 1/2
⇒k = 0.5
Hence, The correct rule of the transformation is,
⇒ Dilation of 0.5.
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How do we solve this?
Correct option is E, The roots of Auxiliary equation are √6 and -√6.
The solution of an nth-order differential equation or difference equation depends on an algebraic equation of degree n called the characteristic equation (or auxiliary equation) in mathematics.
The auxiliary equation, however, lacks true roots. Consider the simple harmonic equation y + y = 0, which has solutions and was given that name because of how it relates to the vibration of a musical tone. Y2(t) = cos t and Y1(t) = sin t. r2 + 1 = 0 is the auxiliary equation for the straightforward harmonic equation.
The Auxiliary form of the given equation is m² - 6 = 0
Using identity a² - b² = (a - b) (a + b),
⇒ The equation becomes (m - √6)(m+√6) = 0
⇒ either m = √6 or m = -√6
Hence, The roots of Auxiliary equation are √6 and -√6.
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AB=16 and BC = 22 what does AC equal
Answer:AC is equal to 88
Step-by-step explanation:
C=11
A=8
B=2
what is the answers to this question
By evaluating the quadratic equation, we will see that the values of the expressions are:
f(-1) + f(4) = 27
f(-1) - f(4) = -35
How to evaluate the given expressions?Here we need to work with the quadratic function:
f(x) = x^2 + 6x + 1
First, we want to find the value of the expression:
f(-1) + f(4)
To get that, we need to evaluate the quadratic equation:
f(-1) = (-1)^2 + 6*(-1) + 1
f(-1) = 1 - 6 + 1 = -4
f(4) = 4^2 + 6*4 + 1
f(4) = 16 + 24 + 1 = 31
Then the first expression is:
f(-1) + f(4) = -4 + 31 = 27
The second expression is:
f(-1) - f(4)
We already know these values, we can replace these to get:
f(-1) - f(4) = -4 - 31 = -35
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What is the difference?
−5−6
−11
−1
1
11
The difference between the two numbers -5-6 is -11 Option A
What is the difference?In basic arithmetic, difference implies the addition or two negative numbers or the subtraction of two positive numbers
The two given numbers we are asked to find the difference are -5-6
We can notice that these tow numbers are negative and negative. to this effect, we have to find the sum of the two negative integers to get
-5 + (-6)
This gives us -11
Conclusively the answer is -11
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The equation, A = 5,000(1 + 0.025t) represents the amount of money earned on a savings account with 2.5% annual simple interest. At the end of the investment period, the account balance is $5,875. How many years is the investment period? 1 year 4 years 7 years 9 years
The number of years that is the investment period, given the account balance, is 7 years
How to find the investment period ?You are given the equation, A = 5,000 ( 1 + 0.025t ) where t is the investment period.
Find the simple interest per year :
= 5, 000 x 2. 5 %
= $ 125
Then find the number of years as :
= ( Account balance - Opening deposit ) / Annual simple interest
= ( 5, 875 - 5, 000 ) / 125
= 7 years
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Answer to this math question
By means of relationship between powers and roots and algebra properties we conclude that radical expression ∛y · [2 · y · ∛(8 · y²) - ∛(y⁵) - 4∛(8 · y²)] is equivalent to 2 · y · ∛(8 · y⁵) - ∛(y⁶) - 4 ∛(8 · y³).
How to simplify a polynomial-like radical expression
In this problem we find a polynomial-like radical expression that must be simplified by algebra properties and by taking advantage of relationship between powers and roots. First, write the entire expression:
∛y · [2 · y · ∛(8 · y²) - ∛(y⁵) - 4∛(8 · y²)]
Second, apply distributive property:
2 · y · ∛(8 · y²) · ∛y - ∛(y⁵) · ∛y - 4∛(8 · y²) · ∛y
Third, use relationship between roots and powers:
2 · ∛(y³) · ∛(8 · y²) · ∛y - ∛(y⁵) · ∛y - 4∛(8 · y²) · ∛y
Fourth, apply multiplication of roots and multiplication of powers of equal base:
2 · y · ∛(8 · y⁵) - ∛(y⁶) - 4 ∛(8 · y³)
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Exhibit 2-3
The number of sick days taken (per month) by 200 factory workers is summarized below.
Number of Days Frequency
0 − 5 120
6 − 10 65
11 − 15 14
16 − 20 1
The number of workers who took more than 10 sick days per month is _____.
A summary of 200 factory workers' monthly sick days is provided. From this, we can tell that about 15 workers took more than 10 sick days per month.
The number of times an event or observation occurred during an experiment or research is referred to as its frequency in statistics. It can alternatively be described as a straightforward count of a specific occurrence. Relative frequency and cumulative frequency are the two main types of frequency seen in statistics.
The given table contains the number of sick days per month and the frequency of factory workers on sick days. Then, the number or frequency of workers who took more than 10 sick days per month is,
number of workers = frequency for 11-15 days + frequency for 16-20 days
=14+1
=15
The required answer is 15 workers.
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Y = - 6x + 4
y = 1/4x - 4
Answer:
x = 1.28, y = -3.68
Step-by-step explanation:
y = -6x + 4
y = 1/4x - 4
-4= -6x - y
4 = 1/4x - y
4= 6x + y
4 = 1/4x - y
8= 6 1/4x
x = 1.28
y = -6(1.28) + 4
y = -7.68 + 4
y = -3.68
The graph of linear equation is always a straight line ?
Yes, the graph of linear equation is always a straight line.
What is a linear equation?Each term in a linear equation has an exponent of 1, and when this algebraic equation is graphed, it always produces a straight line. It is called a "linear equation" for this reason.
Consider the equation y = mx + c to define a linear function with a straight line as its graph.
We are aware that the rate of change, m, for a linear function is constant. On the graph, shifting by 1 always causes you to go up by m as shown in attached image.
The graph thus resembles a staircase. It is a straight line because it always rises in equal-sized steps.
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of Write the equation of this line in slope-intercept form.
Write your answer using integers, proper fractions, and improper fractions in simplest form.
We want to get the equation on the graphed line.
The equation of the line is: y = 8*x - 9
Then the line is something like:
y = 8*x + b
To find the value of b, we can use one of the two points we got above.
The point (0, -9) means that when x = 0, y is equal to -9, then we can write:
-9 = 8*0 + b
-9 = b
Finally, the equation of the line is:
y = 8*x - 9
What is graphed line?When displaying information that changes over time, a line graph, also referred to as a line chart or a line plot, is frequently used.It can be visualized using a series of points connected by straight lines. The "x-axis" and the "y-axis" are two of its axes. An informational change over time is graphically represented by a line graph. It is a graph that was created by connecting points with line segments. An informational change over time is graphically represented by a line graph. It is a graph that was created by connecting points with line segments. A line graph, also referred to as a line plot or a line chart, is a graph in which individual data points are connected by lines.To learn more about line plot refer to:
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Find the center and radius of the circle with the equation:
(x-3)² + (y-1)² = 16
center: (-3,-1)
radius: 4
a.
b. center: (-3,-1)
radius: 16
C.
center: (3, 1)
radius: 4
d. center: (3, 1)
radius: 16
On solving the provided question we can say that in the circle the radius, r = 4 and center, c = -3, -1, so area of the circle will be = [tex]\pi r^2[/tex] = 3.14*4*4 = 50.24 cm sq.
What is circle?Every point in the plane that is a certain distance away from a certain point forms a circle (center). It is, thus, a curve formed by points moving in the plane at a fixed distance from a point. At every angle, it is also rotationally symmetric about the center. A circle is a closed two-dimensional object where every pair of points in the plane are equally spaced out from the "center." A line that goes through the circle creates a specular symmetry line. At every angle, it is also rotationally symmetric about the center.
here,
in the circle
the radius, r = 4
and center, c = -3, -1
area of the circle will be = [tex]\pi r^2[/tex] = 3.14*4*4 = 50.24 cm sq.
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A system of equations is graphed on this coordinate grid.
Which ordered pair is the best estimate of the solution of the system of equations?
(-1, -2)is the best solution of the system of equations.
What is Graph?Graph is a mathematical representation of a network and it describes the relationship between lines and points.
A system of equations is graphed on this coordinate grid.
we need to find the ordered pair which is the best estimate of the solution of the system of equations.
(-1, -2) is the best solution of this graph because both the lines are intersecting at that point
Hence, (-1, -2)is the best solution of the system of equations.
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find f
f '(t) =20/1+t^2 f(1) = 0
If f '(t) =20/1 + t2 f(1) = 0, f is f(x) = 20tan⁻¹(t) - 5π.
Integrals are the values of the function seen by the process of integration.
The procedure of getting f(x) from F (x) is called integration.
Given f '(t) = 20/ 1 + t2 and f(1) = 0
We know that by definition of the integral of tan⁻¹(x) = 1/1 + t2
f '(t) = 20 / 1 + t2 = 20(1/ 1 + t2)
Integrate on both sides, we get
f(t) = 20tan⁻¹(t) + c
f(1) = 0; f(1) = 20tan⁻¹(1) + c = 0
c = -20(π/4) = -5π.
Therefore, f(x) = 20tan⁻¹(t) -5π.
If f '(t) =20/1 + t2 f(1) = 0, f is f(x) = 20tan⁻¹(t) - 5π.
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The dimensions of a box are 2x + 5 meters, x + 4 meters, and x + 2 meters. The volume of
the box is 2,520 m³. Find the dimensions of the box.
The rectangular box dimensions are 21m ,12m and 10m.
What is volume of the rectangular box?
The area of the base times the height of the rectangular prism equals the volume of the object. As a result, the formula for a rectangular prism's volume is given. A rectangular prism's volume is equal to its length, width, and height in cubic units.
Here the dimensions of a box is 2x+5 , x+4 and x+2 meters and volume of the box is 2520 [tex]m^3[/tex].
Volume of rectangular box = w×h×l [tex]unit^3[/tex]
=> 2520 = (2x+5)(x+4)(x+2)
=> 2520 = [tex](2x^2+13x+20)(x+2)[/tex]
=> 2520 = [tex]2x^3+4x^2+26x+13x^2+20x+40[/tex]
=> [tex]2x^3-16x^2+33x^2-264x+310x-2480=0[/tex]
=> [tex]2x^2(x-8)+33x(x-8)+310(x-8)=0[/tex]
=> [tex](x-8)(2x^2+33x+310)=0[/tex]
Here x-8=0 and [tex]2x^2+33x+310=0[/tex]
Then x=8 and x ∈ R.
Now the dimensions 2x+5=2(8)+5=16+5=21m.
=> x+4 = 8+4=12 m.
=> x+2= 8+2 = 10m.
Hence the rectangular box dimensions are 21m ,12m and 10m.
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A math club has 30 members. The number of girls is 2 less than 3 times the number of boys. How many members are boys? How many members are girls?
Answer:Well, we already see that the number of girls is greater than the number of boys, to find the result of girls, just do the division that is 30:2= 15 and boys is 30:3= 10
i hope i have helped you
Step-by-step explanation:
Answer:
8 boys, 22 girls
Algebraic ExpressionsTo solve, you must isolate the variable. This means moving the variable and it's coefficient to the other side of the equation with only the same variable on the same side with all the constants on the other side.
If you multiply, divide, add, subtract, square root, exponent both sides of the equation by the same value, that end value stays the same.
Q)
Lets set the amount of boys to x.
The amount of girls is 3x-2 as the amount of boy is x.
Set up an equation.
x+3x-2 = 30
30 is the amount of members.
Add 2 on both sides.
x+3x+2-2=30+2
Simplify by combining like terms.
4x = 32
Divide 8 on both sides.
[tex]\frac{4x}{4} =\frac{32}{4}[/tex]
x = 8
There are 8 boys in the class.
Plug back into the equation or subtract from 30 to solve for the amount of girls.
30 - 8 = 22
8(3) - 2 = 22
Tornadoes have occurred on every continent except Antarctica. They occur most often between latitudes of 30° and 50°. Write a compound inequality describing the latitude in which tornadoes are not likely to occur.
The tomatoes will not likely occur in less than 30 and greater than 50 latitude regions.
What is inequality?When two expressions are connected by a sign like "not equal to," "greater than," or "less than," it is said to be inequitable. The inequality shows the greater than and less than relationship between variables and the numbers.
Given that Tornadoes have occurred on every continent except Antarctica. They occur most often between latitudes of 30° and 50°.
The region between tomatoes occur is,
30< T < 50
The region in which the tomatoes are not occur is,
T < 30
T > 50
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Please help me with this!
Jon bought a pizza as shown write an equation to find the cost per slice c
The equation to find the cost per slice is c=x/n where x is the total prize of pizza and n is the total no. of slices.
What is equation?An equation is a mathematical formula that connects two assertions using the equal sign (=) to denote equivalence. In algebra, an equation is a mathematical statement that establishes the equivalence of two mathematical expressions. For instance, an equal sign separates the components 3x + 5 and 14 in the equation 3x + 5 = 14. A mathematical formula is used to explain the connection between two sentences on either side of a letter. Frequently, there is just one variable, which is also the symbol. for example, 2x - 4 = 2.
If x is the total price of pizza( which is $20 in this case) and if all the slices are equally cut, then the cost of each slice would be total price divided by total slices.
Hence, the equation is c= x/n
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the graph below represents a linear function. which of the following equations models the linear graph above? please answer and explain why you chose the answer. i will mark you brainliest
D. Y= 4/3 (x)+4
The first step i did was finding C for the standard form equation of a linear function which is:
y=mx+c
Finding C is easy because C is simply the y-intercept(The point that crosses the y axis) which we can see from the graph is 4.
That allowed me to isolate possible answers of B and D because they contain a C which is equal to 4.
To determine which equation it was, i substituted an X coordinate to see if i got the correct Y coordinate from the graph.
Lets try B first and substitute the coordinate -3:
3/4 ×(-3)+4=1.75
As we see thats incorrect because the coordinate on the graph is (-3;0).
So we can conclude it is not b, however lets try D.
4/3 (-3)+4=0.
We see that this equation gives us the correct answer.
So therefore the correct equation is D
4/3 (x)+4
Write 3 numbers that are divisible by 2,
5, and 10.
Answer:
2,4,6,8,0
Step-by-step explanation:
A number is divisible by 2 if it ends in 2, 4, 6, 8 or 0. A number is divisible by 5 if it ends in 5 or 0. A number is divisible by 10 if it ends in a 0.
The City of Rock Hill has an approximate population of 70,000. An average of 100 people move in to Rock Hill every month and 150 people move out of Rock Hill each month. The City of Greenville has an approximate population of 61,000. An average of 200 people move into
Greenville every month. In how many months will the populations of
The number of months it will take for both cities to have the same population is; 36 months
How to solve Algebraic Word Problems?We are given;
Current population of city of rock hill = 70000
Rate at which people move into city of rock hill = 100 people per month
Rate at which people move out of city of rock hill = 150 people per month
Net average increase a month = 100 - 150 = -50 people per month
Current population of City of Greenville = 61000
Rate at which people move into City of Greenville = 200 people per month
If the number of months it will take for both cities to have the same population is x, then it means that;
70000 - 50x = 61000 + 200x
Rearrange to get;
200x + 50x = 70000 - 61000
250x = 9000
x = 9000/250
x = 36 months
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solve the given differential equation by undetermined coefficients.
y"+3y=-48x2e3x
The given differential equation by undetermined coefficients are y(x)=c1cos(31/2 x)+c2sin(31/2x)+(-4x2+4x-4/3)e3x
A differential equation in mathematics is an equation that includes one or more functions and their derivatives. The rate of change of a function at a place is determined by the derivatives of the function. It is mostly employed in disciplines like physics, engineering, biology, and others. The study of solutions that satisfy the equations and the characteristics of the solutions is the main goal of the differential equation.
y'' + 3y=0
λ2+3 =0
λ 1=-i31/2,
λ 2=i31/2.
y0(x)=c1cos(31/2 x)+c2sin(31/2x),
yp(x)=(Ax2+Bx+C)e3x
yp'(x)=(3Ax2+(3B+2A)x+3C+B)e3x
yp''(x)=(9Ax2+(9B+12A)x+2A+6B+9C)e3x
x2e3x:3A+9A=-48,
xe3x:3B+9B+12A=0,
e3x:3C+2A+6B+9C=0.
=>A=-4,B=4,C=-4/3.
yp(x)=(-4x2+4x-4/3)e3x,
y(x)=y0(x)+yp(x)
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