So we're looking at two rectangles, one cut out of the other, so all you do is find the area of the big one, base times height equals area, minus the area of the small one, base times height equals area. So the equation you have to solve for is this, 
Area=(12.6X14)-(3X8.4)
        
                    
             
        
        
        
Answer:
12
Step-by-step explanation:
1.08 1.08 divded by 0.09 equals 12
 
        
             
        
        
        
Equation: y=-5x+100, where x is the number of hours and y is the battery percentage 
The slope is -5, meaning she loses 5% of battery per hour
:)
        
                    
             
        
        
        

Divide by -8 (change inequality sign direction)

Response: 
