I need help with understanding how to convert between systems

Answer asap ! the shortest path from point a to point b goes through a pond. to avoid the pond, you must walk straight 34 meters along one edge of the pond, then take a 90 degree turn, and again walk straight 41 meters along another edge of the pond to reach point b. about how many meters would be saved if it were possible to walk through the pond? a. 11 m b. 20 m c. 30.45 m d. 21.73 m

Find the quotient. 50a2 – 98b2 -5a +7b

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation