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lina2011 [118]
2 years ago
13

Which expression is equivalent to (r^-7)^8

Mathematics
1 answer:
ahrayia [7]2 years ago
6 0

Answer:

1/r^56

Step-by-step explanation:

Not sure if you did a typo there or what cus 7 x 8 should be 56

Whenever the power of a number is negative, you flip. So r^-7 becomes 1/r^7

Remove the bracket and distribute 8 to the power of 1 and r^7

1 to the power of 8 will still be 1, r^7 x 8 = r ^ 56

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Steps:
1.Number the equations..

a+b=77 -1
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2. Choose what variable you want to use. In this case I would use the "b". Since the signs in front of the "b's" are different, add the two equations together

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Then solve to find a:
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