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Margaret [11]
3 years ago
9

I am thinking of a number. when it is increasd by 7, it equals 21. what is my number

Mathematics
2 answers:
olga55 [171]3 years ago
8 0
Let the number be x;
x+7=21
Subtracting 7 from each side,
x+7-7=21-7
x=14
andrey2020 [161]3 years ago
6 0
If X is increased by 7 to make 21
X + 7 = 21
then rearrange the equation to get X
X = 21-7
X = 14(b)
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Step-by-step explanation:

I'm not sure if we can use the number 20 but anyways here it is!

Factors:A factor is simply a number that is multiplied to get a product. Factoring a number means taking the number apart to find its factors.Factors are either composite numbers or prime numbers. A prime number has only two factors, one and itself, so it cannot be divided evenly by any other numbers.

I hope this helps!!

4 0
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The area for a trapezoid is A=1/2(b*1+b*2)h
Your base is your two parallel sides, and your parallel sides in this case is 5cm and 11cm, so that means your bases are 5&11. Your height is 4.
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In order to do this you need to do the distributive property first.
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Then next you need to do:
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yaroslaw [1]

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