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elsauceomotho
29.05.2020 •
Mathematics
Jenny is on the local swim team for the summer and has swim practice four days per week. The schedule is the same each day. The team swims in the morning and then again for 2 hours in the evening. If she swims 20 hours per week, how long does she swim each morning?
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Ответ:
Number of hours Jenny swims each morning = 3 hours
Step-by-step explanation:
Let Jenny swims 'x' hours in the morning each day.
She swims 2 hours in the evening too.
Total hours she swims each day = (x + 2) hours
If her team swims 4 hours per week then number of hours she swims = 4(x + 2)
If she swims 20 hours in a week then,
4(x + 2) = 20
(x + 2) = 5
x = 5 - 2
x = 3 hours
Therefore, Jenny swims 3 hours each morning.
Ответ:
It's A
Step-by-step explanation:
7b - 5b = 2b
3x + 21x = 24x