Which of the following is always true? A. 5x2(r+7)=2x5(r+7)
B. 5+2(r+7)=2+5(r+7) <<< My Answer
C. 5/2(r+7)=2/5(r+7)
D. 5-2(r+7)=2-5(r+7)
Not so. Just expand the expression
5+2(r+7) = 5+2r+14 = 2r+16
2+5(r+7) = 2+5r+35 = 5r+35
Try that with the other pairs, and see which comes out with both sides the same.