Mathematics
Herediacaroline1
2016-09-25 14:23:21
A drawer contains quarters and nickels. there are 200 total coins valuing $30.00. think about a system of equations that can be used to represent the number of quarters and nickels and then think through using substitution to solve the system of equations. how many nickels are in the jar?
ANSWERS
Hugel136
2016-09-25 19:08:28

A) n + q = 200 B) .05n + .25q = 30.00 Multiplying equation A) by -.05 -.05n -.05q = -10  then adding it to B) .05n + .25q = 30.00 .20q = 20.00 100 quarters = 20 dollars 100 nickels =  10 dollars

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