Answer:

Step-by-step explanation:
√(-100)
Use the imaginary number rule 
√(-1) × √(100)
i × √(10²)
i × 10
= 10i
The equation for line E is x = 8.
This is because the line intersects the x-axis at the point (8,0)
I’m 99% sure the answer is:
c: 2t - d = 260
t - d = 320