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USPshnik [31]
3 years ago
9

Which values of a and b make the following equation true?  a = 11, b = 7 a = 11, b = 10 a = 28, b = 7 a = 28, b = 10

Mathematics
2 answers:
Feliz [49]3 years ago
7 0

we have

(5x^{7} y^{2})(-4 x^{4} y^{5})=-20 x^{a} y^{b}

Multiply the terms of the left side of the equation and then compare with the right side to find the values of a and b

(5x^{7} y^{2})(-4 x^{4} y^{5})=-20 x^{(7+4)} y^{(2+5)}

=-20 x^{11} y^{7}

substitute

-20 x^{11} y^{7}=-20 x^{a} y^{b}

Solve for a

x^{11} =x^{a}

a=11

Solve for b

y^{7} =y^{b}

b=7

therefore

the answer is

a=11

b=7

lora16 [44]3 years ago
6 0
A = 11, b = 7
You just needed to multiply the terms together
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