A copy machine makes 143 copies in 3 minutes and 15 seconds. How many copies does it make per minute? I copies per minute
?

I think the Answer is 44 copies per minute
143/3.25 = 44

T= total played
e= # evenings played
m= # minutes played

Total equals number of evenings played multiplied by number of minutes plated per evening.

EQUATION:
t=e * m

EQUATION (if 30 minutes per evening):
t=30e

Example:
3 nights, 30 minutes played

t= 3 * 30
t=90 minutes total played

Hope this helps!  :)