Question 1127429
d + q = 200 therefore d = 200-q
0.10d + 0.25q = 24.50 substitute for d:
0.10(200-q) + 0.25q = 24.50
20 - 0.10q + 0.25q = 24.50
0.15q = 4.50
q = 30 there are 30 quarters in the jar