3 years ago

PLEASE HELP ME ASAP!!!!!!! TY! :)

Mathematics

1 answer:

tekilochka [14]3 years ago

5 0

Answer:

2 nickels and 21 dimes

Step-by-step explanation:

0.05N + 0.1D = 2.2

N + D = 23

Let's use the substitution method. Solve the second equation for N.

N = 23 - D

Now where you see N in the first equation substitute N with 23 - D.

0.05(23 - D) + 0.1D = 2.2

1.15 - 0.05D + 0.1D = 2.2

0.05D = 1.05

D = 1.05/0.05

D = 21

Now substitute 21 for D in the second original equation and solve for N.

N + 21 = 23

N = 2

Answer: 2 nickels and 21 dimes

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