Answer:
2
Step-by-step explanation:
Cómo resolver este problema matemático
El problema matemático es
−
3
+
+
3
x-3+x+3
x−3+x+3
Simplifica
1
Suma los números
−
3
+
+
3
+
2
Combina los términos semejantes
+
2
CNNBC recently reported that the mean annual cost of auto insurance is 965 dollars. Assume the standard deviation is 113 dollars. You will use a simple random sample of 57 auto insurance policies.Find the probability that a single randomly selected policy has a mean value between 939.6 and 972.5 dollars.P(939.6 < X < 972.5)
Answer:
P(939.6 < X < 972.5) = 0.6469
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
CNNBC recently reported that the mean annual cost of auto insurance is 965 dollars. Assume the standard deviation is 113 dollars.
This means that [tex]\mu = 965, \sigma = 113[/tex]
Sample of 57:
This means that [tex]n = 57, s = \frac{113}{\sqrt{57}} = 14.97[/tex]
Find the probability that a single randomly selected policy has a mean value between 939.6 and 972.5 dollars.
This is the pvalue of Z when X = 972.5 subtracted by the pvalue of Z when X = 939.6. So
X = 972.5
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{972.5 - 965}{14.97}[/tex]
[tex]Z = 0.5[/tex]
[tex]Z = 0.5[/tex] has a pvalue of 0.6915
X = 939.6
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{939.6 - 965}{14.97}[/tex]
[tex]Z = -1.7[/tex]
[tex]Z = -1.7[/tex] has a pvalue of 0.0446
0.6915 - 0.0446 = 0.6469
So
P(939.6 < X < 972.5) = 0.6469
The quantities x and y are proportional. Find the constant of proportionality, and write the equation relating the two variables (y = rx) HURRY PLEASE!!
X1 Y1
3 15
5 25
7 35
At Davidson's Bike Rentals, it costs $41 to rent a bike for 8 hours. How many hours of bike use does a customer get per dollar?
Answer:
0.192 hour
Step-by-step explanation:
41$ / 8 = 0.192 hours = 11.703 minutes
How do I solve this question?
Answer:
The correct answer is given by option a.
Step-by-step explanation:
Rational roots theorem:
In the rational roots theorem, we take the leading coefficient(which multiplies the term of x with the highest exponent) and the independent term(which does not multiply any value of x).
The possible roots have the format p/q, in which p are the factors of the independent term, and q are the factors of the leading coefficient.
In this question:
Leading coefficient: 3
Independent term: 15
Factors of the independent term: {1, 3, 5, 15} -> p
Factors of the leading coefficient: {1,3} -> q
Possible roots:
All possible values, positive or negative, in which p is divided by q. So
[tex]\pm \frac{1}{1}, \pm \frac{1}{3}, \pm \frac{3}{1}, \pm \frac{3}{3}, \pm \frac{5}{1}, \pm \frac{5}{3}, \pm \frac{15}{1}, \pm \frac{15}{3}[/tex]
So, without the repeated terms, they are:
[tex]\pm \frac{1}{3}, \pm \frac{5}{3}, \pm 1, \pm 3, \pm 5, \pm 15[/tex]
The correct answer is given by option a.
Jack runs 3 miles 4 times a week. How many miles does Jack run in 6 weeks
Which expression is equivalent to 7(-7v - 7) - v?
-49V - 50
-50v - 49
-8V - 49
-50v - 7
Answer:
-50v - 49
Step-by-step explanation:
Just distribute you can even use a calculator
What is the value of x in the matrix equation below?
Answer:
Where? Provide it please.
Step-by-step explanation:
Theo is baking a
recipe that makes 36
cookies with 2 cups of
sugar. At this rate, how
many cups of sugar
are needed to bake 18
cookies?
Answer:
26 bc it is equall
Step-by-step explanation:
Answer:
1 cup
Step-by-step explanation:
You divide 36 by 2 to see how many cookies can be made with 1 cup which is 18 so in this question its 1
I need help! What is the answer to this problem?
- 6 because when you multiply a negative my a negative you get a positive. so the answer would then be 12 which is greater than ten.
The Jackson family is driving from Boston to New York for a summer vacation trip. So far, they have driven 84 miles which is 40% of the total miles of their trip. How many total miles is the Jackson’s trip from Boston to New York?
The answer you are looking for is 210 miles.
To find this answer you must first make 40% into a decimal. To do so, simply divide 40 by 100. This will give you 0.4.
Next, you divide 84 by 0.4. You divide because the percentage of a number is found by multiplying said number by the decimal form of the percent. Since we arent looking for the percentage of a number, but rather the number from which the percentage came, we do the opposite operation.
84 ÷ 0.4 = 210. Thus meaning 210 miles is your answer.
I hope this helps!
The total number of miles that Jackson’s trip from Boston to New York will be 210 miles.
What is the percentage?The quantity of anything is stated as though it were a fraction of a hundred. A quarter of 100 can be used to express the ratio. Per 100 is what the term percent signifies. The symbol ‘%’ is used to symbolize it.
The Jackson family is driving from Boston to New York for a summer vacation trip. So far, they have driven 84 miles which are 40% of the total miles of their trip.
Let x be the total number of miles. Then the equation is given as,
0.40x = 84
Simplify the equation, then we have
x = 84 / 0.40
x = 210 miles
The total number of miles that Jackson’s trip from Boston to New York will be 210 miles.
More about the percentage link is given below.
https://brainly.com/question/8011401
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Jennie has 7 tickets for carnival rides. The Ferris wheel costs 4 tickets, The roller coaster costs 6 tickets. the merry-go-round cost 3 tickets. Jennie wants to ride all three rides. She correctly writes and solves an equation to find t, the number of additional tickets she must buy. Which could show Jennie's work?
Answer: 6
Step-by-step explanation:
7 - 3 = 4
3 - 4 = 0
0 - 6 = -6
Answer:
Step-by-step explanation:
Games
eeww
Two cakes are shared equally among seven friends. What fraction of a cake
will each friend get?
Answer:
Step-by-step explanation:
Hii
Need help quick plzzzz
Answer:
1 if its not that its 2.
Step-by-step explanation:
sorry if im wrong is sucked at this specific type of math
Answer:
A
Step-by-step explanation:
Slope = change in y/change in x
Choose any two points that are on the line, find the difference between the y and the difference between the x, and set as a fraction.
In this case, we can use (0,0) and (1,1) since both points are on the line.
Difference in y: 1 - 0 = 1
Difference in x: 1 - 0 = 1
Write as a fraction: 1/1
Simplify: 1
Not happy Bob, n o t h a p p y
Answer:
I hope you feel happy
Be happy bud there is good coming for u
Step-by-step explanation:
Find the value of given trigonometric function cot (-330°)
Answer:
The exact value should be
[tex] \sqrt{3} [/tex]
Step-by-step explanation:
Though you can get this directly out from your calculator, but you can utilize the opposite angle identities, cot(-
θ)=-cot θ, then use the trig identity, which is
[tex] \cot(θ) = \frac{ \cos(θ) }{ \sin(θ) } [/tex]
So cot (-330)=cos (-330)/sin (-330)
Help me ...................
Add or subtract. –29 + 40
Answer: well, technically you add but.... the answer is 11. Since it's a negative, one way to find the answer is to subtract 40 from 29, which is 11.
Step-by-step explanation:
The absolute value of -15 is -15 because -15 is 15 units to the left of zero
Answer: False
Step-by-step explanation: The absolute value of -15 is 15.
What is a piggyback mortgage?
A. Two interest rates on a single mortgage
B. Two mortgages on the same house
C. Two mortgages for two different houses
D. One mortgage for a portion of the house value and a cash down
payment for the remainder
Answer:
is two mortgages for two different hourses.
Answer:
Two mortgages on the same house (confirmed).
Step-by-step explanation:
Aph3x
The theoretical probability of drawing a red card from a deck of cards is 1:2. Micheal drew 20 cards and received 7 red and 13 black.
What is the best explanation for this result.
A. Theoretical results are correct, regardless of how many cards are drawn.
B. Two decks of cards should be used.
C. Simulations do not always produce theoretical results.
D. More cards needed to be drawn.
Answer:
A. Theoretical results are correct, regardless of how many cards are drawn.
Step-by-step explanation:
Answer: A. Theoretical results are correct, regardless of how many cards are drawn.
Step-by-step explanation:
Plato
The values in the table represent a linear function. How does the value of y
change in relation to a change in the value of x? The value is negative four
X Y
9 4
3 0
-3 -4
-9 -8
Answer:
The table shows that:
The value of y decreases when the value of x decreases or vice versa, the value of y increases as x increases.Therefore the line has a positive slope
Convert the expression (√5)(∛5) to exponential form. Show your work.
Answer:
[tex] {5}^{ \frac{5}{6}}[/tex]
Step-by-step explanation:
[tex]( \sqrt{5} )( \sqrt[3]{5}) \\ \\ = ({5}^{ \frac{1}{2} } ).({5}^{ \frac{1}{3} } ) \\ \\ = {5}^{ \frac{1}{2} + \frac{1}{3} } \\ \\ = {5}^{ \frac{3 + 2}{2 \times 3}} \\ \\ \huge \red{ \boxed{ = {5}^{ \frac{5}{6}} }}[/tex]
jack maclean has entered into real estate
Answer:
im sorry but id ont know
Step-by-step explanation:
what is the difference between multiplying fractions and adding/subtracting fractions? complete sentances please
Answer:
See Explanation!
Step-by-step explanation:
When multiplying fractions, you do not need a common denominator, and the entire fraction gets multiplied across, however when adding or subtracting fractions, you must have a common denominator, and then only compute the numerator, as the bases are already the same
What is the area of the figure?
26 ft 2
18 ft 2
32 ft 2
24 ft 2
Answer:
32
Step-by-step explanation:
y = –6x+2
–12x – 2y = –4
How many solutions does this linear system have?
1. one solution: (0, 0)
2. one solution: (1, –4)
3. no solution
4. infinite number of solutions
Step-by-step explanation:
y=-6x+2
y=-6x+2 since both are equal, it can have infinite solutions
a(n) ______ probability is based on repeated trials of an experiment
Answer:
xfhdvhhjjhsjsdhdsjjfsjf
Step-by-step explanation:
Perform the following
mathematical operation, and
report the answer to the
appropriate number of
significant figures.
5.87998 + 3.100 = [?]
The answer after performing mathematical operation is 8.97998 .
What is mathematical operations?
In order to add, subtract, multiply, or divide two or more quantities, one must perform a series of four fundamental operations known as mathematical operations. They involve the study of numbers and the order of operations, which are important in all other areas of mathematics like algebra, data processing, and geometry. Without employing mathematical operation rules, we are unable to solve the issue. The addition, subtraction, multiplication, and division operations all follow the same four fundamental rules.
Here the given ,
=> 5.87998 + 3.100
=> 5.87998
+ 3.10000
--------------------
8.97998
=> 5.87998+3.100=[8.97998]
Hence after performing mathematical operations the answer is 8.97998.
To learn more about mathematical operations refer the below link
https://brainly.com/question/25828217
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Help please this is my last question left
Answer:
10a and 5a+2a+3a
Step-by-step explanation:
6a + 4a = 10a
10a = 10a
9a is not equal to 10a
10+a is not equal to 10a
5a+2a+3a = 10a
6a - 4a is not equal to 10a
a^10 is not equal to 10a
Hope this helps! :)
What is the length of side c?
A)
5 ft
B)
25 ft
81 ft
D)
128 ft
the answers is here is the answer A)5
Answer:
the answer is 5 ft
Step-by-step explanation: