Mathematics, 30.01.2020 01:03 chloesmolinski0909
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when ella does 13 push-ups and 7 sit-ups, it takes a total of 60 seconds. in comparison, she needs 96 seconds to do 13 push-ups and 19 sit-ups. how long does it take ella to do each kind of exercise?
it takes ella seconds to do a push-up and seconds to do a sit-up.
Answers: 3
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when ella does 13 push-ups and 7 sit-ups, it takes a total of 60 seconds. in comp...
when ella does 13 push-ups and 7 sit-ups, it takes a total of 60 seconds. in comp...
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