Find the slope of a line perpendicular to each given line x=3

Solve the system of equations y= 3/2 - 1, -x+ y =-3

If abcde is reflected over the x-axis and then translated 3 units left, what are the new coordinates d?

As a self-employed seamstress, you know that it takes 7 yards of material to make 3 jackets. you bought 15 yards of material to make 7 jackets. did you buy enough material? if not, how much were you over or under?