I hope it helps you get it right
 
        
        
        
Answer:

Step-by-step explanation:

(x₁, y₁) is the 1st coordinate while (x₂, y₂) is the 2nd coordinate.
Gradient of the line



 
        
             
        
        
        
Answer:
from the picture the answer is D. 
Step-by-step explanation:

to find x subtract 18x from 4x which will give you -14x=-36
divide both sides by -14
 
        
             
        
        
        
Answer:
230
Step-by-step explanation:
300 - 70 = 270 boom