Answer:
Explanation:
x+y≤11
y≤11-x
taking only equal signs
y=11-x
5x+10y≥80
divide by 5
x+2y≥16
taking equal signs
x+2y=16
x+2(11-x)=16
x+22-2x=16
-x=16-22=-6
x=6
y=11-x=11-6=5
nickels=6
dimes=5
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