7n²mp⁴ • 3n³m⁴p-⁴ (that's supposed to be a negative exponent)

When we are multiplying eponents with the same base, we do is writing the sum of both exponents:

SO, in our case:

We have to do this three times and multiply the numbers:

= (any number whose exponent is equal to 0 has a value of 1) =

So now we know that =

Sample response: Gaira made a mistake when substituting the value –7.5 in for x. She multiplied both terms of the expression by –7.5 when she should have only multiplied –3.8 by –7.5. The correct answer is 34.5.

brainliest?