Tim's piggy bank contains dimes and nickels worth $5.50. He has 70 coins in all. Use substitution to solve the system of equations to find out how many of each coin Tim has.

5.50=0.10d+0.05n
70=d+n

how to solve-
n=70-d
5.50=0.10d+0.05(70-d)
5.50 = 0.10d +3.5 -0.05d
5.50= 0.05d+3.5
2=0.05d
d=40

70=d+n
70=40+n
n=30

there are 40 dimes and 30 nickels

Answer Link

ohorowitz ohorowitz · Answer 2 · 2022-01-14T00:24:23+01:00

ohorowitz ohorowitz

14-01-2022

Answer:

there are 40 dimes and 30 nickels.

Step-by-step explanation:

5.50=0.10d+0.05n

70=d+n

how to solve-

n=70-d

5.50=0.10d+0.05(70-d)

5.50 = 0.10d +3.5 -0.05d

5.50= 0.05d+3.5

2=0.05d

d=40

70=d+n

70=40+n

n=30

Answer Link

Tim​'s piggy bank contains dimes and nickels worth ​$5.50. He has 70 coins in all. Use substitution to solve the system of equations to find out how many of each coin Tim has.

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Tim's piggy bank contains dimes and nickels worth $5.50. He has 70 coins in all. Use substitution to solve the system of equations to find out how many of each coin Tim has.