Answer:

Step-by-step explanation:
Multiply the fraction by the conjugate and solve (would explain more but you're on a time crunch)
Answer:
distributive property
Step-by-step explanation:
Distributive property says that x(y + z) = (x*y) + (x *z)
Answer:
48
Step-by-step explanation:
5 60
-- = ----
4 x
5x= 240
--- ------
5 5
x=48
The answer for this question is choice c. Memorization is not a good way to truly understand math. You want to understand the reasoning behind your answers always.
A math expert is what you should strive to be! The first two choices are great ways to become this.