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.

answer: 180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

the entire expression should be subtracted from 30. to subtract the quantity, distribute the negative sign, which changes the signs on the terms. so, the –2 changes to positive and gets added to 30 instead of subtracted from it.

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