They all can be a characteristics of a line except ITS WIDTH CAN BE MEASURED...
Answer: 530
Step-by-step explanation:
First u add 50, 30+50=80, the. 80+100=180, 180+150=330, 330+200= 530 and so on
For this case we must solve the following equation:

We apply distributive property on the right side of the equation:

We subtract 6y on both sides of the equation:

We subtract 6 from both sides of the equation:

Dividing by 6 on both sides of the equation:

So, the result is 
Answer:

It’s either a or c because it’s not a straight line so it’s definitely not b or d
X + 17 = 3x -31 (opposite angles are equal)
x + 17 = 3x -31
31 +17 = 3x - x
48 = 2x
x = 24