Which of these systems of linear equations has no solution?
2x+8y =15
4x+10y =30
2x-y=18
4x+ 2y = 38
4x+7y= 17
8x-14y - 36
4x-3y = 16
8x-by = 34

Which number line represents the solution set for the inequality - x 24?

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

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