HELP PLEASE I SWEAR I MIGHT DIE CAUSE OF THIS

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

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?