HELP PLS ANYONE I BEG U

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?

Can someone check if i did this correct. it’s number 4 if you’re wondering.