Multiplying factors with exponents means you can add the exponents.
So

A negative exponent becomes positive when you move it to the denominator, so:
Answer:
He should sell his CD's for $2.
Step-by-step explanation:
Each crate contains 60 blank CD’s and each crate cost $35.
This means that he will pay $35 for 60 CD's.
How much should he sell his CD’s to make a profit of $85?
He will sell each of the 60 CD's for x, which means that his earnings will be of 60x.
Profit: Earnings - Cost = 60x - 35
To make a profit of $85




He should sell his CD's for $2.
Answer:
b. The range only includes numbers greater than or equal to 0.
Step-by-step explanation:
Any square of a number will never lead to a negative number
The range of an equation is it's numerical possibilities for y
Since a square of a negative number never leads to a negative y
The answer is therefore, the range can only be zero and above
(otherwise the roots would be imaginary)