my7butterflies
20.04.2021 •
Mathematics
Grayson is trying to incorporate more exercise into his busy schedule. He has several short exercise routines he can complete at home. Last week, he worked out for a total of 103 minutes by doing 2 arm routines and 3 abdominal routines. This week, he has completed 3 arm routines and 3 abdominal routines and spent a total of 117 minutes exercising. How long does each routine last?
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Ответ:
Difference (m²n²- mn - 11) ( C).
Step-by-step explanation:
Given : (m²n²-7) - (mn+4) .
To find : Difference .
Solution : We have (m²n²-7) - (mn+4) .
Removing second parenthesis
(m²n²-7) - mn - 4) .
Now, combine like terms
(m²n²- mn - 4 - 7) .
(m²n²- mn - 11) .
Therefore, Difference (m²n²- mn - 11) ( C).