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I need an answer and a explanation so I can do the rest of them

I need an answer and a explanation so I can do the rest of them-example-1
User Arnb
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2 Answers

6 votes

Answer:

N=85 nickels

Q=18 quarters

User John Petrak
by
8.3k points
7 votes

9514 1404 393

Answer:

equations: q+n = 103; 0.05n +0.25q = 8.75

solution: q=18; n=85

Explanation:

Write one equation for the number of coins:

q+n=103.

Write another equation for the value of the coins:

0.05n +0.25q = 8.75.

It is often convenient to substitute for the lower value, here, using n = 103-q. This results in an equation for q with positive coefficients.

0.05(103 -q) +0.25q = 8.75

5.15 +0.20q = 8.75

0.20q = 3.60

q = 18

n = 103 -18

n = 85

Wes has 18 quarters and 85 nickels.

User Irm
by
8.3k points

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