I need the answers for these

How far could you drive on 50 gallons of gas

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

3x + 4y = 5 x- 3y = -7 solve by substitution