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2 years ago

A rectangle has a length of 5x - 15 and a length of 2x + 7. What is the area of the rectangle?

Mathematics

1 answer:

Sergeu [11.5K]2 years ago

3 0

2(5x-15) + 2(2x+7) =0
10x-30+4x+14 = 0
14x = 16
x = 8/7

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$x-\frac{3}{2}=\pm\frac{\sqrt{25}}{\sqrt4}\\\\x-\frac{3}{2}=\pm\frac{5}{2}\\\\x-\frac{3}{2}=-\frac{5}{2}\ or\ x-\frac{3}{2}=\frac{5}{2}\\\\x=-\frac{5}{2}+\frac{3}{2}\ or\ x=\frac{5}{2}+\frac{3}{2}\\\\x=-\frac{2}{2}\ or\ x=\frac{8}{2}\\\\x=-1\ or\ x=4$

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2 years ago

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A rectangle has a length of 5x - 15 and a length of 2x + 7. What is the area of the rectangle?​

A rectangle has a length of 5x - 15 and a length of 2x + 7. What is the area of the rectangle?