Solve the problem.

-Andy has some $10 bills and some $20 bills in a shoebox under his bed. He has a total of 53 bills worth a total of $700. How many $20 bills does he have?
A) 19
B) 16
C) 17
D) 14

Question

Solve the problem.

-Andy has some $10 bills and some $20 bills in a shoebox under his bed. He has a total of 53 bills worth a total of $700. How many $20 bills does he have?
A) 19
B) 16
C) 17
D) 14

Quizplus · Accepted Answer

Let x be the number of $10 bills and y be the number of $20 bills.

We know that:

x + y = 53 (total number of bills)
10x + 20y = 700 (total value of the bills)

Simplify the first equation:

x = 53 - y

Substitute into the second equation:

10(53 - y) + 20y = 700

Distribute the 10:

530 - 10y + 20y = 700

Combine like terms:

10y = 170

Divide both sides by 10:

y = 17

So Andy has 17 $20 bills. The best choice is C.

Solve the Problem. -Andy Has Some $10 Bills and Some $20 Bills in Some