Answer:
x^2+8x+12
Step-by-step explanation:
 
        
             
        
        
        
Answer:
9 1/15 Hours
Step-by-step explanation:
First you must find the LCD of the two fractions. Then, you can add them together very easily. Last, just simplify. 
Hope this helps!
 
        
             
        
        
        
1. 2x+7
2. 9
3.11 
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Answer: $634.40
Step-by-step explanation:
Finding the average: Adding all the numbers, then dividing by the amount of numbers added. 
524+715+670+588+675 = 3172
3172/5 = 634.40