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Marrrta [24]
3 years ago
8

A jar contains n nickels and d dimes there are 30 coins in the jar and the total value of the coins is $2.10 Set up and solve a

system of equations to find how many nickels and how many dimes are in the jar
Mathematics
2 answers:
Gekata [30.6K]3 years ago
8 0

Answer:

12 dimes and 18 nickels

Step-by-step explanation:

Equations given by word problem:

n + d = 30

0.05n + 0.1d= 2.10

How I solved them:

d= 30 - n

0.05n + 0.1(30 - n)= 2.10

0.05n + 3 - 0.1n= 2.10

-0.05n= -.09

Divide both sides by -0.05

n= 18

18 + d = 30

d= 12

Taya2010 [7]3 years ago
6 0
Yes I agree with the person above me who have answered before me
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Why not write all of the numbers in decimal fraction form, to make them easier to compare?

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