HELP ME PLEASE REALLY IMPORTANT OR ILL GET IN TROUBLE

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?

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

Which ordered pair is a solution to the system of linear equations? 2x + 3y= 6 –3x + 5y = 10