Are the lines y = –x + 8 and 3x + 3y = 9 perpendicular? Explain.

No

Step-by-step explanation:

Rearrange the equations to match the linear y=mx+b

1. 3x + 3y = 9

y = -x +3

2. y = -x + 8

y = -x + 8

Since the two equations have the same slope, they are parallel, not perpendicular.

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

207/8 is the right