5y=20x+15 Please help me im stuck in this question if you get it right im give tou a mark

The hypotenuse of an isosceles right triangle is $14\sqrt 2$. what is the area of the triangle?

Madeline takes her family on a boat ride. going through york canal, she drives 6 miles in 10 minutes. later on as she crosses stover lake, she drives 30 minutes at the same average speed. which statement about the distances is true?

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?