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professor190 [17]
3 years ago
15

Peggy had 4 times as many quarters as nickels. She had $2.10 in all. How many nickes and how many qurters did she have ?

Mathematics
1 answer:
Delicious77 [7]3 years ago
8 0
A) 4*N -Q = 0
B) .05N + .25Q = 2.10

Multiply B) by 4
B) .2N + Q = 8.40 Adding this to A)
A) 4*N -Q = 0
4.2N = 8.40
N = 2 Nickels
Q = 8 Quarters


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A collection of 19 coins consisting of nickels and dimes is worth $1.35. How many dimes are there
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Answer:

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Step-by-step explanation:

This question is solved used a system of equations.

I am going to say that:

x is the number of nickels.

y is the number of dimes.

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This means that x + y = 19.

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0.05x + 0.1y = 1.35

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We have to find y.

From the first equation: x = 19 - y.

Replacing in the second:

0.05(19 - y) + 0.1y = 1.35

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y = 0.4/0.05

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