Question

Kyle is training for a marathon. The equation y = 3x + 5.5 represents the number of miles Kyle can run over time, where y is the number of miles Kyle runs and x is the number of weeks Kyle has been training.

• How long will it take Kyle to be ready to run the entire marathon of 26.5 miles?

Answer 1

Substitute the length of marathon into y.
26.5= 3x + 5.5

Solve for x (because that’s the amount of weeks needed to be ready and prepared)

3x = 26.5 - 5.5
3x = 21
x = 7
7 weeks of training is needed