Answer:

Step-by-step explanation:

All you have to do is move the denominator on the other side, by multiplying.
a-10
------- = -9
20
multiply 20 x -9
= -180
then it becomes a-10=-180
+10 +10
a=-170
Answer:
B
Step-by-step explanation:
Line crosses y-axis at 2.
Slope =
For each 1 square the line rises/falls it moves to the right/left 5 squares.
Negative slope lines are downhill left to right.