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son4ous [18]
3 years ago
7

I need help explaining

Mathematics
2 answers:
sukhopar [10]3 years ago
4 0

Answer:

Sure.

Step-by-step explanation:

So X is a variable meaning its a letter that represents a number. When there are a number and a variable (or a letter) like this 2x or 9y it means you are going to multiply the number by the variable. In this case it is 7 times x is equal to 21 so all we have to do is find what times 7 is equal to 21 and that number is 3. So if 7*x=21 is 7*3=21 then x=3. If you have any questions ill be more than open to answering them, hopefully this helped. Have a good day/night.

ser-zykov [4K]3 years ago
3 0
7x means 7 times a “mystery number” = 21
We can ask, “7 times what equals 21?”

The math family of equations here is
3 x 7 = 21
7 x 3 = 21
21 / 7 = 3
21 / 3 = 7

So to solve for x, or find out mystery number, we have 7x = 21
Whatever we do to one side of the equation, we have to do to the other side to keep it equal. Here, we’ll divide both sides by 7, so that on the left side, x is by itself.
Then we have x = 21/7 which is x = 3

Please ask any questions in the comments
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4 years ago
The radius of a semicircle is 18 kilometers. What is the semicircle's area?
Sergio039 [100]

Answer:

Area of a semi circle is 1/2πr²

r = radius

Area = 1/2 × π × 18²

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Hope this helps.

8 0
3 years ago
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A client's inventory is recorded at $600,000 and is comprised of 1,000 items. The auditors examined a sample of items with a rec
KonstantinChe [14]

Based on the calculation done below, the estimated audited value for inventory is $540,000.

<h3>How is the estimated audited value for inventory calculated?</h3>

This can be calculated using the following formula:

E = (T / S) * A ……………………… (1)

E = Estimated audited value for inventory = ?

T = Total value of inventory recorded by client = $600,000

S = Value of inventory sampled by the auditor as recorded by the client = $100,000

A = Audited value of the inventory sampled = $90,000

Substituting the values into equation (1), we have:

E = ($600,000 / $100,000) * $90,000

E = 6 * $90,000

E = $540,000

Therefore, the estimated audited value for inventory is $540,000.

Learn more about inventory audit here: brainly.com/question/13960552

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3 0
2 years ago
15 points!!! Help!! Find x. Round to the nearest tenth
horsena [70]

Answer:

So let the hypotenuse be

x

:

sin

(

47

°

)

=

opposite side

x

sin

(

47

°

)

=

12

x

To solve for

x

, divide

sin

(

47

°

)

by

12

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x

=

12

sin

(

47

°

)

x

≈

16

Step-by-step explanation:

7 0
3 years ago
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BARSIC [14]

$143

First you would have to find out the price that the tent was bumped up to.

52*150%=78

You then add the answer to your original price.

52+78=130

You then have to find the sales tax. You do this by multiplying 10% to your new price.

130*10%=13

You then have to add the sales tax to your number.

130+13=143

$143 is your answer.

4 0
3 years ago
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