If |x|=-4, what are the possible values of x?

Iwill give you ! what is the measure of ∠v ?

When 142 is added to a number the result is 64 more then 3 times the number. option 35 37 39 41

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