Question

a copy machine can print 810 copies every 9 minutes. A laser printer printed 1,350 copies. How long did it take to print?

Answer 1

Answer:

15

Step-by-step explanation: You would think 15. 810 copies every 9, minutes. Nine divided by 810 equals 90. 90 copies every minute. 1,350 divided by 90 is fifteen. =fifteen.

Answer 2

810 / 9 = 1350 / x amount of minutes (cross-multiply)

x = 15 minutes