Explain the steps to the quadratic formula when solving the equation x^2+2x-7=0

Tori examined the pattern of exponents in the table. based on the pattern, which statements are true? check all that apply.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

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