Answer: -1
Step-by-step explanation:
i really don't know but i was taking a test and i guessed it and it was right
Answer:
2√5
Step-by-step explanation:
You can factor -80 as

So, we have

The square root of a product is the product of the square roots:

Since
and
, we have

Answer:
15 dollars per hour
Step-by-step explanation:
She is constantly charging 15 per hour.