Answer:
24
Step-by-step explanation:
Lets start by working out 80% of 30
80% x 30=24
so the student answered 24 questions correctly
4 x 4 x 4 = 64 is the answer
Answer:
367.50
Step-by-step explanation:
First find the discount
525 * 30%
525 * .30
157.50
Subtract this from the price
525-175.50
367.50
This is the new price
The way that you would do this is by taking

out of the binomial, or as I like to think about it, 'un-distributing'. :p

out of

, you end up with

.
When you take

out of

, you get

.
Put it together, and the solution is

-

.
Hope I helped!!