E. state whether the lines are parallel, perpendicular, or neither. explain your reasoning and show your work.

9. 5x + 4y = -60
y = (-4/5)x - (3/5)

10. y = 5x - 10

5y = -x + 20

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.