The equation which can be used to find the number of quarters and nickels is; n + q = 84, 0.05n + 0.25q = 17.80.
<h3>Quarters and nickels</h3>
- Total coins = 84
- Total value = $17.80
let
- Number of quarters = q
- Number of nickels = n
n + q = 84
0.05n + 0.25q = 17.80
From equation (1)
n = 84 - q
Substitute into (2)
0.05n + 0.25q = 17.80
0.05(84 - q) + 0.25q = 17.80
4.2 - 0.05q + 0.25q = 17.80
- 0.05q + 0.25q = 17.80 - 4.2
0.20q = 13.60
q = 13.60 / 0.20
q = 68
Substitute q = 68 into
n + q = 84
n + 68 = 84
n = 84 - 68
n = 16
Therefore, the number of quarters and nickels are 68 and 16 respectively.
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Answer:
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If you would like to convert 29/5 to a mixed number, you can do this using the following steps:
29/5 = 5 4/5
The correct result would be 5 4/5.
“Keep, Change, Flip” so keep the 4/5 then change the •|• and then flip the last fraction to 5/1 and then multiply the fractions like normal
Answer:
The answer is D. 62.8
Step-by-step explanation:
I used this formula.
Circumference = 2πr