Answer:
26°
Step-by-step explanation:
 <DFG+<EFG = 180°( Being sum of adjacent angle in linear pair is 180°) 
 You can also write; 
<DFG+<EFG = 180°( Being sum of supplementary angle is 180°)
 By putting the value of those angles;
5y+3+(2y-5)=180
 5y+3+2y-5=180
 5y+2y-5+3 =180°
 7y-2=180°
 7y=180+2
 7y=182
 y=182/7
 y=26°
Hence,
 The value of y is 26°
 
        
             
        
        
        
Answer:

Step-by-step explanation:
The variable w is equivalent to y, and the variable z is equivalent to x. 


 
        
             
        
        
        
We know that 3 point can creating always a plane 
so from this result the right choice is A. so is true 
        
             
        
        
        
Answer:
x = 2, x = -5/2
Step-by-step explanation:
2x² + x - 10 = 0
(2x + 5)(x - 2) = 0
2x + 5 = 0
2x = -5
x = -5/2
x - 2 = 0
x = 2