The range of the function is C.
When a questions asks about the RANGE of the function, they are specifically talking about Y-VALUES. If a questions asks about DOMAIN, they want the X-VALUES.
This is a quadratic function.
A and B could be eliminated right away since range asks for y-values, not x-values.
        
                    
             
        
        
        
Answer:
715 minutes
Step-by-step explanation:
we know that
To find out how many more minutes he can use, subtract the number of minutes he has already talked from the number of minutes  of his plan
Let
x -----> the number of minutes  of his plan
y -----> he number of minutes he has already talked 
so

we have

substitute

 
        
             
        
        
        
To find the answer ,multiply 2 1/2 by 2/5
(2/5)*(2 1/2)=1
Therefore you should use 1 cup of flour.
        
             
        
        
        
X = 82
a corresponding angle of 82 is also the vertical angle to x. This makes then equal.