Answer:
y= -3
Step-by-step explanation:
x+y=-4
-
x-y=2
_________
eliminate x so ur left with
2y= -6
divide
y= -3
Answer:
B
Step-by-step explanation:
Answer:
8
Step-by-step explanation:
use tangent so opp/adj
9/tan4 which equals 7.7 or 8
Answer: 
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Work Shown:
Part 1

Part 2

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Explanations:
- There are quite a bit of steps. I decided to break things into two parts.
- The goal is to get x all by itself on its own side, which is why I subtracted (x-n)/n from both sides in part 1, step 2. I also subtracted p from both sides.
- Afterward, I gave each fraction the LCD mn. I multiplied top and bottom of the first fraction by n/n. I did a similar operation to the second fraction, but with m instead.
- From there, we distribute and simplify. The mn terms cancel on the left side numerator (second step of part 2).
- The n≠m is there to prevent the denominator (n-m) from being zero. We cannot divide by zero.
- If the formulas don't properly display, then you might have to refresh the page.