Step-by-step explanation:
21/20 = m/100
m = 100 * (21/20) = 105.
It is the 3rd answer, y+6= 13(x+2) since the the point slope formula is
y-y1 = m(x-x1)
you plug the y-value of the coordinate point into y1 and you plug the x-value of the coordinate into x1. You plug the slope into m.
Answer by JKismyhusbandbae: $76.50
Explanation: Substitute 3 for m and simplify.
Work: (Attached in Picture)