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

Question

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

brooke..help00 · Answer

Before I can start guiding you. How do you think you could find the answer?

ebonyserrano · Answer

by dividing 143 and 3 minutes and 15 seconds?

mathmale · Answer

Find the unit rate:  Divide 143 (copies) by the elapsed time, 3 minutes, 15 sec.  You must change that "3 minutes, 15 sec" to either an improper fraction (a/b) or a decimal fraction:  (x.yy)
                               change in # of copies
Rate of change = --------------------  
                                elapsed time

mathmale · Answer

"by dividing 143 and 3 minutes and 15 seconds?"  

Better written as "by dividing 143 BY 3 minutes and 15 seconds"

ebonyserrano · Answer

what about the 3 and 15?

mathmale · Answer

Please read my comments, above.  3 minutes and 15 sec. needs to be converted to a number of minutes only, no seconds.

mathmale · Answer

15 sec is what fraction of 1 min?

ebonyserrano · Answer

idk 1/15?

mathmale · Answer

how many sec in 1 minute?

ebonyserrano · Answer

60

ebonyserrano · Answer

@mathmale

mathmale · Answer

Yes, that's right, tho' I'd prefer you include the units:  60 sec = 1 min.

You can make two different conversion factors from this equation:$$1=\frac{ 1~\min }{60~\sec  }~and~1=\frac{ 60 \sec }{ 1~\min }$$

mathmale · Answer

Which conversion factor would be the more helpful in converting "15 sec" to "minutes?"
Please share your work.