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?

 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

(sin 42)/31. = sinx)/37

sinx = 37 (sin42)/31

= 37× 0.66/31 = 0.787

x= 51.9

other angle opposite to y = 180-51.9-42

= 180- 93.9 =86.1

so

sin42)/31 = sin 86.1)/y

0.021 = 0.997 /y

y= 0.997/0.021 =47.47

$9.41

step-by-step explanation: