Can someone help me pls??

Which is f(5) for the function –2x2 + 2x - 3?

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters