Answer:
10
Step-by-step explanation:
20 quarters: $5 and
10 nickels: 50 cents
20-10=10
20 quarters ($5) and 10 nickels ($0.50)
Q+ N = 30
Q = 30-N
0.5N + 0.25(30-N) = 5.50
0.5N + 7.50-0.25N = 5.50
-0.20N = -2
N=10 Q=30-N Q=30-10 Q=20
10*0.5 = 0.50
20*0.25 = 5
5 + 0.5 = $5.50
hope it helps you........
90 im not sure tho but hopefully its correct
Take a sleep like 25 minutes and then you will be able to answer it for yourself
