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3 years ago

13

Plz this is getting graded 20 pt

2 answers:

Alenkasestr [34]3 years ago

5 0

Answer:

pretty sure this would be A

777dan777 [17]3 years ago

5 0

A is correct, because it’s saying 2 per hour is the same things as 2x. 2x=30 would get you the answer because you would divide by both sides, and get 15 plug it back into the equation and you would get 30!
Hope this helps.

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The government published the following stem-and-leaf plot showing the number of sloths at each major zoo in the country: pls ans

Sveta_85 [38]

Answer:

3

Step-by-step explanation:

If 4 | 1 = 41, that means that when you're looking at the number, you basically see it without the "|". If you see it that way, the smallest number would be 03.

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2 years ago

I need help on this.

andrew11 [14]

To find the midpoint, add x1 and x2 then divide by 2, then add y1 and y2 and divide by 2.

Midpoint = (2a +2b /2 , 0 + 2c /2)

Midpoint = a+b, c

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2 years ago

What is the absolute value of each number 2 1/3

Arlecino [84]

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3 years ago

Height, in meters, is measured for each person in a sample. After the data are collected, all the height measurements

charle [14.2K]

Answer:

(E) The z-scores of the height measurements

Step-by-step explanation:

Mean is given by

$\bar {x}=\frac{1}{n}\left(\sum _{i=1}^{n}{x_{i}}\right)=\frac{x_{1}+x_{2}+\cdots +x_{n}}{n}$

Where,

n = Number of people

$x_{i}$ = The heights of people

When converting m to cm the mean would be

$\bar {x}=\frac{1}{n}\left(\sum _{i=1}^{n}{x_{i}}\right)\times 100$

So, the mean would change

The median gives us the middle data value when the data values are in ascending order.

So, the median would change

Standard deviation

$s=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}(x_i-\bar{x})^2}$

When converting to centimeters

$s=\sqrt{\frac{1}{N-1}\sum_{i=1}^{N}\left((x_i-\bar{x})\times 100\right)^2$

Hence, the standard deviation would change

When converting to centimeters the maximum height in meters would be the maximum height in centimeters also.

The z score is given by

$z=\frac{x-\mu}{\sigma}$

where,

x = Data point

$\mu$ = Mean

$\sigma$ = Standard deviation

When converting to centimeters

$z=\frac{(x-\mu)\times 100}{\sigma\times 100}\\\Rightarrow z=\frac{x-\mu}{\sigma}$

Hence, the z score would remain the same

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3 years ago

The sum of the measures of two complementary angles exceeds the difference of their measures by72°. Find measure of the smaller

weqwewe [10]

Answer: 18

Step-by-step explanation:

this is because complementary angles add up to 90 degrees so you would just subtract 72 from 90 to get your answer :)

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3 years ago