Which are true of the function f(x) = 49?

Ineed with number 17 i don’t get it at alll

Use the distributive law to multiply. 3(4x + 5y + 6)

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =