Write the following sentence as an equation. Use x to represent "a number." The product of 2 and the sum of
6 and a number is -40.
The equation is a
(Do not simplify.)

Me with this one question, and i'll upvote the brainliest answer

The table represents a function. what is f(-2)? a.-3 b. -1 c.1 d.3

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