Question

M=15.75+3.2d Find M when d=20

Answer 1

15.75+3.2*20=M;
M=15.75+64;
M=69.75.
Answer: 69.75.

Answer 2

This equation written as a linear line equation is Y=3.2x+15.75 ( I think that looks nicer) and then if you were to graph it on a graph. youse that when x Or in your case D is twenty Y/M is 79.75