Vehicle 1 = 18 miles per gallon
Vehicle 2 = 16.67 miles per gallon
Vehicle 1
        
             
        
        
        
x² + y² = 9 is the equation of a circle with center (0, 0) and radius 3.
This puts the vertices at (-3, 0), (3, 0), (0, -3), and (0, 3).
When is the tangent line vertical? <em>when it passes through the x-axis.</em>
Answer: (-3, 0), (3, 0)
 
        
             
        
        
        
Step-by-step explanation:
a) 

b) 

 
        
             
        
        
        
I think it’s B. 7.50+1.50x<_15
        
                    
             
        
        
        
Red blood cell, as they have a biconcave shape and need to store a lot of haemoglobin, the pigment of blood 
hope this helps! :)