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Serjik [45]
3 years ago
9

A piggy bank contains nickels and dimes. There are 160 total coins valuing $10.50. Think about a system of equations that can be

used to represent the number of nickels and dimes and then think through using substitution to solve the system of equations. How many nickels are in the piggy bank?
99


1,090


110


1,100
Mathematics
1 answer:
Elodia [21]3 years ago
6 0
x + y = 160 \\ 0.05x + 0.1y = 10.50
First, Substitute x + y = 160 into equation
x = 160 - y
0.05(160 - y) + 0.1y = 10.50 \\ 8 - 0.05y + 0.1y = 10.50 \\ 0.05y = 2.50 \\ y = 50
Substitute that into
x + 50 = 160 \\ x = 110

The answer is 110.

Hope this helps. - M
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The flutists goal is to raise 18% of the total amount needed the trumpeters goal is 85% of the flutists goal. If both of these g
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The goal amount of the student groups are given in percentages, which are fractions based on one hundred.
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Required:
The group that raise more money, given that their goals are met
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