-3x + 3y = 5
-x + y = 3
can someone help me ASAP

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.

How do i make someone brainliest? (if you answer me, i might be able to make you brainliest! )

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)