One number is four times another number, and their difference is 24

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.

Do you mind if you guys me with this question i’m on number 8

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a, b and c integers and a> 1