225k views
1 vote
Autumn has $0.64 worth of pennies and nickels. She has a total of 20 pennies and nickels altogether. Determine the number of pennies and the number of kickers that autumn has.

User Accelerate
by
7.2k points

1 Answer

4 votes

Answer: Nickels x = 11 and pennies y = 9

Step-by-step explanation:

Let be nickels x and pennies y

We will form a system to solve this problem:

5 x + 1 y = 64

x + y = 20/ · (-1)

we will first multiply the second equation by -1 and add it by the first and get:

4 x = 44 ⇒ x = 44 / 4 = 11 nickels

x = 11 nickels

from the other we get y

y = 20 - x = 20 - 11 = 9 pennies

y = 9 pennies

User Vidalbenjoe
by
6.6k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.