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levacccp [35]
3 years ago
15

If a^2 -b^2 =12 and a-b=4 what is the bay of a +b

Mathematics
1 answer:
slava [35]3 years ago
7 0

Answer:

a+b = 3

Step-by-step explanation:

a = b+4

a^2 = (b+4)(b+4) = b^2 + 8b +16=-b^2 = 12

8b=-4

b = - 1/2

a = 3.5

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f a rectangle has a perimeter of 70, a length of x and a width of x - 9, find the value of the length of the rectangle.
trasher [3.6K]

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x =  \frac{88}{4}  = 22
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and the width is
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Answer:

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Step-by-step explanation:

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Answer:

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2 years ago
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