Answer:
X=2
Step-by-step explanation:
When x is 2, y=3 for both equations 
 
        
             
        
        
        
Answer:
No
Step-by-step explanation:
-18-7 is not equal to -6(3x-8) beacuse
-6(3x-8)= -18x+42
its obivous that the two values are not same
 
        
                    
             
        
        
        
Lets see!
We need to use the pythagorean theorem (a^2+b^2=c^2) to check. 
So..
15^2+ 17^2 = 19^2
225+ 289= 361
Hm 225 and 289 do NOT equal 361 therefore it is NOT a right triangle.
        
                    
             
        
        
        
Answer:
13
Step-by-step explanation:
to find the length between two point you've got to use the formula 
√(x2-x1)^2 +(y2-y1)^2
√(-2-3)^2 + (-4-8)^2
√(-5)^2 + (-12)^2
√ 25+144
√169
13