Please helpp -7 over -2 =??​

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

You got a job selling magazines door-to-door. you are paid $100 per day plus $1.50 for each magazine you sell. which recursive formula models this situation?

Which coefficient matrix represents a system of linear equations that has a unique solution ? options in photo*