A copy center charges 40 cent for the first three copies and 7 cents for each additional copy. How many copies can be made for 75 cents?
NEED THE EQUATION BADLY!
2007-04-01 14:02:01 · 9 answers · asked by Bright Hikari 1 in Education & Reference ➔ Homework Help
What grade are you in????
2007-04-01 14:05:22 · answer #1 · answered by Anonymous · 1⤊ 1⤋
the first 3 copies cost 40 cents you have 75cents ,subtract 75-40=35 35/7=5 5 more copies can be made
2007-04-01 21:20:55 · answer #2 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
n copies
40 cents for the first 3 copies
n-3 copies left at 7 cents each...7(n-3)
total: 7(n-3) + 40 = 75
7n-21+40=75
7n+19=75
n=8
2007-04-01 22:15:37 · answer #3 · answered by Lokikona 3 · 0⤊ 0⤋
.75 = .40 + .07x
x = number of copies
.35/.07 = x
x = 5
plus the 3 that you get for the first .40 cents
so 8 total
2007-04-01 21:07:23 · answer #4 · answered by rburgquist 2 · 0⤊ 0⤋
8 copies
75-40=35/7=5+3=8
2007-04-01 21:51:30 · answer #5 · answered by Ally A 2 · 0⤊ 0⤋
it would be 8 copies. you subtract 40 automatically, since u need that to begin with, and u get 35
then u just divide 7(the cost) by 35(what u have left for the cost) and u get 5. add 3 to 5 and u get 8
2007-04-01 21:05:43 · answer #6 · answered by ladaloop88845 2 · 0⤊ 0⤋
75=40*3+7x, then slove
hope this helps! : )
2007-04-01 21:06:16 · answer #7 · answered by Princess T 1 · 0⤊ 0⤋
40+x7=75, but i'm not completely sure.
2007-04-01 21:05:57 · answer #8 · answered by jai 2 · 0⤊ 0⤋
75-40=35 3 copies
35/7=5 copies
5+3=8 duh ....
2007-04-01 22:03:22 · answer #9 · answered by Tasha 2 · 0⤊ 0⤋