Given:
quarters and dimes ; 19 pcs
total value of quarters and dimes is 4
q + d = 19
0.25q + 0.10d = 4
q = 19 - d
0.25(19 - d) + 0.10d = 4
4.75 - 0.25d + 0.10d = 4
-0.15d = 4 - 4.75
-0.15d = -0.75
d = -0.75/ -0.15
d = 5
q = 19 - d
q = 19 - 5
q = 14
There are 5 pieces of dimes and 14 pieces of quarters.
The equation is 20x = 1200
x=1200÷20
x=60 rows
Answer:
A
Step-by-step explanation:
I think it is $10 for 20%