Substitute the value of y in the equation as -1,
(-1)^2-31(-1)-17 = 1+31-17 = 15
 
        
             
        
        
        
Answer:
I got it.
Step-by-step explanation:
-12a - (-15b) + (-3c)
 
        
             
        
        
        
Answer: a. 55
Step-by-step explanation:
The formula to find the geometeric mean between two numbers a and b is given by :-

The given numbers are : 275 and 11
The geometric mean of 275 and 11 is given by :-

Hence, the geometric mean of 275 and 11 is 55.
So , the correct option is a. 55 .
 
        
             
        
        
        
Answer:
Step-by-step explanation: