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PLEASE HELP & SHOW WORK!

1. Suzette ran and bikes for a total of 110 mi in 7 h. Her average running speed was 5 mph and her average biking speed was 20 mph.

Let x = Total hours Suzette ran.
Let y = Total hours Suzette biked.

Use substitution to solve for x and y. Show your work. Check your solution.

Note: I genuinely appreciate the help. I will be sure to mark BRAINLIEST as well. Thank you in advance to all that can help!

Respuesta :

Eureka1Fa

Finding x.

Suzette ran = x

Suzette biked = 4x

7 = x + 4x --) 7 = 5x --)  1.4 = x

Suzette ran for 1.4 hours

Finding y.

Quickest way is to use Suzette biked = 4x and substitute the x for 1.4 to find how much she biked.

4 x 1.4 = 5.6

1.4 + 5.6 = 7 hours the total time exercising

And the mileage adds up to.

5(1.4) + 20(5.6) = 119