Answer:
64
Step-by-step explanation:
4^3=64
4*4=16
16*4=64
Answer:
You could use one quarter and two dimes... that will equal $0.45
(I'm not sure what you are asking for)
<h3>
Answer: y = 7</h3>
Work Shown:

Explanation:
I replaced every x with -1. Then used the order of operations (PEMDAS) to simplify. Keep in mind that
and not 
Answer:
3/4
Step-by-step explanation:
21/28=3/4