The number of days d, he must use the gym to make the membership worthwhile is at least 21 days
Equation
Non members:
Cost of swimming per day = $5
Cost of exercise per day = $9
Total = $5 + $9
= $14
Members:
Yearly fee = $300
Exercise fee per day = $4
Swimming fee = $0
The number of days d, he must use the gym to make the membership worthwhile = $300 ÷ 14
= 21.42857142857142
Approximately,
21 days
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=20/3
I hope I helped!
Happy new years,
Cheers,
Mabel L.
You would recieve $37.95 a year then multiply that by 7 years to get $265.65
You would 4 to both sides of the equation
