Math post-test! (will mark brainiest)
the length of a rectangular room is 8.9 m and its width is 5.2 m. find the area of the room.

79.21 m2

46.28 m2

28.2 m2

27.04 m2

Which shows the correct solution of the equation 1/2a+2/3b=50, when b=30?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.