18.5 ft, 6 ft, 17.5 ft

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?