Will mark brainliest what is the value of x? 10 15 30 45

If jm equals 5x -8 and lm equals 2x -6 which expression represents jl

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 =

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab