Yoon has a number of dimes and quarters she wants to put into rolls. She has 124 coins in all that add up to $20.50. If a roll of quarters is equal to ten dollars, how many extra quarters does she have that will not fill up a roll?

Question

Mathematics

Kaiya Hebert

19 July, 14:05

Yoon has a number of dimes and quarters she wants to put into rolls. She has 124 coins in all that add up to $20.50. If a roll of quarters is equal to ten dollars, how many extra quarters does she have that will not fill up a roll?

+5

Answers (1)

Know the Answer?

Mckay · Answer 1

A) D + Q = 124

B).10D +.25Q = 20.50

Multiply B) by - 4

B) -.40D + - Q = - 82.00 then add to A)

A) D + Q = 124

.60 D = 42

D = 70 Dimes

Q = 54 Quarters

A roll of quarters = $10 = 40 Quarters so there will be 14 "extra" quarters.