If jim =5x - 8 and lm =2x -6,which expression represents jl?

Ill mark the brainliest if you me with the these three questions 7,8,9

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?