Answer:
3x-4y
Step-by-step explanation:
combine like terms. 2x+x=3x.
-5y+y=-4y
Answer:
4
Step-by-step explanation:
It's AoPS question
Answer:
x = 3.5
Step-by-step explanation:
Triangle to the right:
4^2 + x^2 = 8^2
16 + x^2 = 64
y^2 = 48
Triangle to the left:
x^2 + 6^2 = 48
x^2 + 36 = 48
x^2 = 12
x = sqrt(12)
x = 3.5
No because a triangle is 180 degrees and the following angles only equal to 165