Answer:
160
Step-by-step explanation:
The top right quadrant is 90 and the given is 70, adding them equal 160. It is the only option that is greater than 90 degrees anyway.
Answer:
363 inches squared
Step-by-step explanation:
Area = 
. 
is 3 so it's just 11 squared times 3. Which is 121 times 3. That equals 363.
It does not look like Suro even made an error. She took the square root of both sides to get x = 7, I don't see any problem here.
The solution is (5, 15)
Multiply the second equation by 2 and then add through.
3x + 2y = 45
8x - 2y = 10
-----------------
11x = 55
x = 5
Then plug in to get the y value
3(5) + 2y = 45
15 + 2y = 45
2y = 30
y = 15
