Question

Gary exercises 1.75 hours on Mondays, Wednesdays, and Saturdays. How many weeks will it take Gary to exercise a total of 21 hours?
What equation models the problem?


How many weeks will it take Gary to exercise a total of 21 hours?

Answer 1

Answer:  The equation is 5.25x = 21  and it will take Gary 4 weeks to exercise 21 hours.

Step-by-step explanation:

So we know a week is  7 days and Gary exercise 3 days out of the 7 days.

so we will have to multiply 3 * 1.75 to find the number of hours that  she exercise in 1 week.

3 * 1.75 = 5.25  so Gary exercises  5.25 for every week  so now we could use x to represent the number of weeks Gary will take to exercise 21 hours.

5.25x = 21  where x is the number of weeks.

x= 4