your coin collection totals $24. you have an equal # of nickels,quarters,and half-dollars. How many coins do you have??
please help ..: =] mmkay thanks,..
2006-12-11 10:06:30 · 3 answers · asked by McKenzie 2 in Science & Mathematics ➔ Mathematics
You have x sets of nickels, quarters, and halves.
Then
(.05 + .25 + .50)x = 24.00
.80x = 24.00
x = 30
But there are three coins in each set. So the number of coins is:
3x = 90
2006-12-11 10:16:32 · answer #1 · answered by Northstar 7 · 0⤊ 0⤋
you only need 1 variable to solve
.50x + .25x + .05x = 24
solve for x
.80x = 24
x= 30
30 * 3 (nickels, quarters, and dimes) = 90
you have 90 coins total.
2006-12-11 10:22:38 · answer #2 · answered by Baysoc23 5 · 0⤊ 0⤋
there's thiry of each coin so there's 90 coins in all.
(.05x30)+(.5x30)+(.25x30)=answer
1.50 + 7.50 + 15.00
9.00 + 15.00
24.00
hope this helps.
this was fun thanks for posting! :)
2006-12-11 10:22:38 · answer #3 · answered by jack bauer 2 · 0⤊ 0⤋