Which property explains why these two expressions are equal? 7 q 4 = 4 7 q a) associative b) commutative c) distributive eliminate d) inverse

Anyone know? is appreciated! will mark brainliest if correct!

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

In the following diagram it is given that dec, ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2