Identifying a function from 2 differently represented scenarios compare these 2 scenarios. Which scenario, A or B, represents a function?

Acircular city park has a sidewalk directly through the middle that is 111 - feet long. if each bag of fertilizer covers 50 square feet, then determine how many bags of fertilizers the parks and recreation department needs to use to cover the circular park. ignore all the sidewalks around and through the park.

Two cyclists 84 miles apart start riding toward each other at the same. one cycles 2 times as fast as the other. if they meet 4 hours later, what is the speed (in mi/h) of the faster cyclist?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2