add all the angles and make them equal to 360
88 + 108 + (3x-6) + 2x = 360
196 + 5x -6 = 360
190 + 5x = 360
5x = 170
x = 34 = answer
 
        
             
        
        
        
9514 1404 393
Answer:
   C.  3x² +24
Step-by-step explanation:
Use the given function definitions and simplify.
   
 
        
             
        
        
        
Step-by-step explanation:
y = mx + b
y = -7x + 7
this assumes m = - 7 , it got chopped off, otherwise what ever slope is change the first 7 for that number. 
 
        
             
        
        
        
I'm going to answer this as a process going down:
√x+1=6       The statement
x+1=6²        Move the sqrt to the other side
x=6²-1         As well as the +1
x=36-1        Simplified the equation
x=35           Final answer
        
             
        
        
        
70? Is this a trick question?