The sum of twice a number and 5/3 of it is 4 less than 100

In what form is the following linear equation written y=9x+2

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

Find dy/dx using implicit differentiation ln(20+e^xy)=y