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Mathematics 16 Online
OpenStudy (anonymous):

can somebody please help me with this question??...A copy machine makes 60 copies per minute. a second machine makes 80 copies per minute. the second machine starts making copies 2 minutes after the first machine starts. both machines stop making copies 8 minutes after the first machine started. together, the 2 machines made how many copies?

jimthompson5910 (jim_thompson5910):

the first machine runs for 8 minutes the second machine runs for 6 minutes (since the first one got a 2 min head start)

jimthompson5910 (jim_thompson5910):

first one makes 60 copies per min, so how many copies can the first one make in 8 min?

OpenStudy (anonymous):

480

jimthompson5910 (jim_thompson5910):

the second one makes 80 copies per min and runs for 6 min so it makes a total of _____ copies

OpenStudy (anonymous):

480

jimthompson5910 (jim_thompson5910):

add the two totals

OpenStudy (anonymous):

960

jimthompson5910 (jim_thompson5910):

that's your final answer

OpenStudy (anonymous):

thankyou!

jimthompson5910 (jim_thompson5910):

you're welcome

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