Answer:
yes
Step-by-step explanation:
Answer:
x= 13
Step-by-step explanation:
x + 8 = 21
x + 8-8 = 21-8
x = 13
Answer:


Step-by-step explanation:
1. 



○○•○○
2. 



Answer:
y=-x-1 or, y-8=-1(x+9)
Step-by-step explanation:
Parallel lines have the same slope. in your current equation you have a slope of <u>-1</u>. We can use this slope and your set of points in the point slope formula.
<u>y-y1=m(x-x1)</u>
(-9, 8)
x1 y1 m=-1
<u>y-8=-1(x+9)</u>
y-8=-1x-9
+8 +8
<u>y=-x-1</u>
Answer:
D
Step-by-step explanation:
-2x+9=x+7
-2x-x=7-9
-3x=-2
3x=2
x=(2/3)