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Sphinxa [80]
3 years ago
12

Find the value of x in each of the following

Mathematics
1 answer:
skelet666 [1.2K]3 years ago
6 0
A) 2x-7=13
2x=20
x=10

B) 3x+4=25
3x=21
x=7
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Thank u to da person who is willing to help me will get this Brainliest! :3
kumpel [21]
1) use distributive property
3x - 6 + 5x + 4
8x - 2

2) 4-2x - 14 - 3
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2 years ago
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Find the perimeter of a square with side a. Are the perimeter of the square and the length of its side directly proportional qua
inna [77]

The perimeter of a square with side a = 7.2 cm is 28.8 cm. Yes there exists a direct proportional relationship between Side length and Perimeter of square

<h3><u>Solution:</u></h3>

Given that side of square "a" = 7.2 cm

We have to find the perimeter of square

<em><u>The perimeter of square is given as:</u></em>

Perimeter of square = 4a

Where "a" represents the length of side of square

Substituting the given value a = 7.2 cm in above formula, we get perimeter of square

Perimeter of square = 4(7.2) = 28.8 cm

<em><u>Are the perimeter of the square and the length of its side directly proportional quantities?</u></em>

\begin{array}{l}{\text { perimeter of square }=4 a=4 \times \text { length of side }} \\\\ {\frac{\text { perimeter of square }}{\text { length of side }}=4}\end{array}

The Perimeter is equal to a constant times the Side length, or the Perimeter divided by the Side length is equal to four. So this is definitely a proportional relationship between Side length and Perimeter.

Two values are said to be in direct proportion when an increase in one results in an increase in the other.

So when length of sides increases, perimeter also increases

Hence perimeter and length of side of square are directly propotional quantities

4 0
3 years ago
Why shouldn't you use double negatives? It's a riddle for my Math Class
IRINA_888 [86]

A negative times a negative is a positive. I am not sure if that's the question, but hopefully that helps if it was.

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Need help, Due ASAP!
VMariaS [17]

Stop posting on here and do the work yourself I usually don't mind helping people but in some cases, I need to just say do it by yourself look at notes look up the answer there are a million things you can do instead of spam posting all your questions good day

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Which number sentence shows that the sum of a number and its opposite is 0?
Kazeer [188]

Answer:

A. −4 + 4 = 0

Step-by-step explanation:

-4 + 4 = 0

4 - 4 = 0

So option A will be the answer

3 0
2 years ago
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