All you do is divide -12/20 by 4/4 which is -3/5
A). because B,C, and D didnt really make any sence
-3/5 they have opposite slopes so they would never touch but are parallel.
A) D + Q = 124
B) .10D + .25Q = 20.50
Multiply B) by -4
B) -.40D + -Q = -82.00 then add to A)
A) D + Q = 124
.60 D = 42
D = 70 Dimes
Q = 54 Quarters
A roll of quarters = $10 = 40 Quarters so there will be 14 "extra" quarters.
