Select the number sentence that illustrates the commutative property of addition.
22 + 11 = 33
22 − 11 = 11
22 + 11 = 11 + 22
22 + 11 = 22 + 5 + 6

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

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