Answer:

Step-by-step explanation:
(1/2)x
use rise over run
how many units up/down and units right/left
Down and left means negative
4 / 4^3 = 4^-2 = 1 / 4^2 = 1/16
X-the $5 bills
y-the $10 bills
x+y=20
5x+10y=120
It's a system.
0 because you never included how many pages there were total
The quotient would be about 0.571 (rounded)