1/3 cube root 27 <=w
2 answers:
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nickels ($0.05): D + 14
dimes ($0.10): D
quarters ($0.25): Q
Quantity: (D + 14) + D + Q = 102 ⇒ 2D + 14 + Q = 102 ⇒ 2D + Q = 88
Value: 0.05(D + 14) + 0.10(D) + 0.25(Q) = 13.60 ⇒ 0.05D + 0.70 + 0.10D + 0.25Q = 13.60 ⇒ 0.15D + 0.70 + 0.25Q = 13.60 ⇒ 0.15D + 0.25Q = 12.90 ⇒ 15D + 25Q = 1290
2D + Q = 88 ⇒ -15(2D + Q = 88) ⇒ -30D - 15Q = -1320
15D + 25Q = 1290 ⇒ 2(15D + 25Q = 1290) ⇒ <u>30D + 50Q</u> = <u>2580 </u>
35Q = 1260
Q = 36
Answer: 36 quarters