Please help me answer this :) and explain how you got your answer ! ( will give brainslt )

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

7x+8y=-18, 4x-9y=-3 solve the system of equations

Line l passes through points (0,4) and (3,6) what is the slope of a line that is parallel to line l -2/3 -3/2 2/3 3/2