Concept Check Answer each question.Area of a Picture  The mat around the picture shown mea...

Concept Check Answer each question.

Area of a Picture  The mat around the picture shown measures x inches across. Which one of the following equations says that the area of the picture itself is 600 in.2?

A. 2(34 – 2x) + 2(21 − 2x) = 600

B. (34 – 2x) (21 – 2x) = 600

C. (34 − x) (21 − x) = 600

D. x(34)(21) = 600