What is the right answer? explain why?

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy