To find the percent of increase get the difference between the prices and then divided by the oringinal price and then time that by 100
increase =
7.5
thats the answer i got for this

You need to work inside out.

simplifies to

.
Now you need to cube that.

Therefore the solution is

.
Answer:
3x-20
Step-by-step explanation:
I had this test yesterday and this was the correct answer