Then known number in an algebraic expression is

Consider a graph for the equation y= -3x+4. what is the y intercept? a) 4 b) -4 c) 3 d) -3

Aiden drives to school and back each day. the school is 16 miles from his home. he averages 40 miles per hour on his way to school. if his trip takes 1 hour, at approximately what speed does aiden drive home?

Which ordered pair (c,d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15