What is the value of s? 0.7(3s+4)−1.1s=7.9

These question are hard can you me with answers

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52