How do I turn this equation into slope-intercept form? -2x + y = -4

Please show your work on how you solved this. THIS IS FOR MY TEST I NEED HELP ASAP!!

4. find the geometric mean of 4 and 12. 24 8

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 =

Rewrite so the subject can be y in the formula d=m-y/y+n