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vitfil [10]
2 years ago
7

PLEASE HELP WILL GIVE BRAINLIEST!!

Mathematics
1 answer:
kherson [118]2 years ago
5 0

Answer:

305.5 sq inches

Step-by-step explanation:

A (trapezoid) = 1/2·h·(sum of bases)

A = 1/2(17)(8 + 23)

A = 8.5(31)

A = 263.5

A(triangle) = 1/2·b·h

A = 1/2·(6)·(17-3)

A = 3(14)

A = 42

Total Area = 263.5 + 42.0 = 305.5 sq in

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In a data set with a minimum value of 54.5 and a maximum value of 98.6 with 300 observations, there are 186 points less than 81.
slava [35]

Answer:

81.2 is the 62th percentile

Step-by-step explanation:

What is the interpretation for a percentile?

When a value V is said to be in the xth percentile of a set, x% of the values in the set are lower than V and (100-x)% of the values in the set are higher than V.

300 observations, there are 186 points less than 81.2. Find the percentile for 81.2.

So

p = \frac{186}{300} = 0.62

81.2 is the 62th percentile

3 0
3 years ago
Will give brainliest
Tresset [83]
Wouldn’t it be B. SSS
5 0
3 years ago
What is the image of point (-7, 7) for mapping (x, y) , (x – 1, x + 6).
Tcecarenko [31]
Well you can fill out the equation (-7-1, 7+6)
it'll give you 
(-8,13) 
I believe that is what you are asking for :)
Good Luck
8 0
3 years ago
Please help me asap<br><br><br> ty :)
Art [367]

Answer:

y = 5x+7

Step-by-step explanation:

Parallel lines have the same slope so y = 5x+9 is in slope intercept form

y = mx+b where m is the slope and b is the y intercept

The slope is 5

The new line will have a slope of 5

y = 5x+b

We know a point on the line (-2,-3)

Substitute this point into the equation

-3 = 5(-2)+b

-3 = -10+b

-3+10 = b

7 = b

y = 5x+7

3 0
2 years ago
Read 2 more answers
An article in the November 1983 Consumer Reports compared various types of batteries. The average lifetimes of Duracell Alkaline
Allushta [10]

Answer:

The mean is of -0.4 hours.

Step-by-step explanation:

To solve this question, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

Mean of the sample of 64 Duracell:

By the Central Limit Theorem, 4.1 hours.

Mean of the sample of 64 Eveready:

By the Central Limit Theorem, 4.5 hours.

Mean of the difference?

Subtraction of normal variables, so we subtract the means.

4.1 - 4.5 = -0.4

The mean is of -0.4 hours.

8 0
3 years ago
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