Answer:
n=10
Step-by-step explanation:
5n-20=3n
-20=-2n
10=n
Distribute the .25 to get .25x + 1 - 3 = 28
Then simplify to get .25x - 2 = 28
Move the two to the right to get .25x = 30
Then divide to leave x: 30 / .25 = 120
X = 120
False it can work with non right angles triangles too
Answer:
it would be c when fully simplified.