ladybugys
30.04.2021 •
Mathematics
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Ответ:
See explanation
Step-by-step explanation:
Let x be the number of minutes Jack jogs and y be the number of minutes Jack rides his bike.
Part A.
Jack jogs and rides his bike for a total of 75 minutes every day, then
He rides his bike 15 minutes more than he jogs, then
So, the pair of linear equations to show the relationship between x and y is
Part B.
Substitute the second equation into the first equation:
Jack spends 30 minutes each day jogging.
Part C.
Suppose Jack spends 60 minutes riding his bike every day, then he spends 60 - 15 = 45 minutes jogging every day. In total, he spends 60 + 45 = 105 minutes every day. Since 105 is greater than 75, then it is not possible.