Ask question

Ask question

All categories

2 years ago

15

Find the value of x . 12.5,−10,−7.5,x ; The mean is 11.5 .

1 answer:

fomenos2 years ago

4 0

There are four values, including the unknown value x. The sum of the four values is the given value of the mean, 11.5, multiplied by four. Let S be the sum of the four values. Then we can write:
$S=11.5\times4=46$

$46=12.5 + (-10)+(-7.5)+x$
x = 46 + 5 = 51
The answer is: The value of x is 51.

You might be interested in

Derrick needs to figure out how he’s doing on his test scores so far this year. You can help by calculating the mean and the med

romanna [79]

Answer:

74.4 ,81.5 , median

Step-by-step explanation:

ed20 answers

4 0

2 years ago

Read 2 more answers

What is the cube root of -729a9b6

Harman [31]

<u>ANSWER</u>

$\sqrt[3]{- 729{a}^{9} {b}^{6} } = - 9 {a}^{3} {b}^{2}$

<u>EXPLANATION</u>

We want to find the cube root of

$- 729 {a}^{9} {b}^{6}$

We express this symbolically as:

$\sqrt[3]{- 729 {a}^{9} {b}^{6} }$

The expression under the radical called the radicand.

We need to express this radical in exponential form using the property,

${x}^{ \frac{m}{n} } = \sqrt[n]{ {x}^{m} }$

Applying this rule gives us:

$\sqrt[3]{- 729 {a}^{9} {b}^{6} } = ({- 729 {a}^{9} {b}^{6}})^{ \frac{1}{3} }$

$\sqrt[3]{- 729{a}^{9} {b}^{6} } = ({- {9}^{3} {a}^{9} {b}^{6}})^{ \frac{1}{3} }$

Recall that

$({a}^{m} )^{n} = {a}^{mn}$

We apply this rule on the RHS to get,

$\sqrt[3]{- 729{a}^{9} {b}^{6} } = ({- {9}^{3 \times { \frac{1}{3} } } {a}^{9 \times { \frac{1}{3} } } {b}^{6 \times { \frac{1}{3} } }})$

This simplifies to

$\sqrt[3]{- 729{a}^{9} {b}^{6} } = - 9 {a}^{3} {b}^{2}$

3 0

2 years ago

Read 2 more answers

Vera examined a random sample of deodorants distributed by her company. She found the following probabilities:

kkurt [141]

P(for men | botanic) = 5/18

6 0

2 years ago

Read 2 more answers

Write the coordinates of the vertices after a rotation of 180 degrees counterclockwise around the origin.

Umnica [9.8K]

90 degrees you are looking to your side

180 degrees you are looking behind you

around origin of 0,0

the image is flipped into the negative world if it is in posiitve or vice versa

8 0

2 years ago

Find the third degree polynomial function that has an output of 1,025 when x=5, and has zeros −20 and −4i.

Mumz [18]

Answer:

im not sure

Step-by-step explanation:

8 0

2 years ago

Read 2 more answers