Question

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 ?

If the variable n represent the number, then which the following expressions represent the number of quarters ?

Answer 1

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