The value of n is a distance of 1.5 units from -2 on a number line. Click on the number line to show possible values on n. (Please answer this to me in a simple way and explain, I also don't understand how 1.5 - -2 is 0.5 or 3.5, I'm very confused)

Match each inequality to the number line that represents its solution

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

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x