Question

Derrick has a total of 9 nickels and quarters in his pocket. The total amount of money he has in coins is $1.45. How many nickels and how many quarters does Derrick have? (with solution)

A. 3 nickels and 6 quarters
B. 6 nickels and 3 quarters
C. 4 nickels and 5 quarters D.
5 nickels and 4 quarters

Answer 1

A) N + Q = 9

B) .05 N + .25 Q = 1.45

Multiplying A) by -.25 we get

A) -.25 N -.25Q = -2.25 then adding B)

B) .05 N + .25 Q = 1.45

-.2N = -.80

4 Nickels

5 Quarters

Answer is C

Explanation: