How to prove it ? please help me​

2a+7+4ahow many terms? how many variables? any like terms? yes noif yes, which ones? what are the coefficients? any constants? yes noif yes, which ones? simplify the expression by combining like terms and constants: how many terms now?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?