For every decimal place you move a decimal through a number you can think of it as multiplying or dividing by ten. 
take for example 1000.0 
if you move the decimal to make this number 100.00 you divided it by ten 
if you move the decimal again to make 10.000 you divided ten again
but, if you make the number bigger, say 10000. then you have multiplyed by ten. 
        
             
        
        
        
Answer:
 Hal
Step-by-step explanation:
Hal got 54 points because 6 points for green times 9 green is 54 points. Jay got 49 points because 7 points for red times 7 red is 49 point.
 
        
                    
             
        
        
        
1,-7 would be the answer I believe
        
                    
             
        
        
        
Answer:
Step-by-step explanation:
- 6(x - 7)= 2x + x + 9
- 6x - 42 = 3x + 9
- 6x - 3x = 9 + 42
- 3x = 51
- x = 51/3
- x = 17
 
        
             
        
        
        
(f + g)(x) is equal to f(x) + g(x).
So (f + g)(x) = (3x + 5) + (-2x^2 - 5x + 3) = -2x^2 - 2x + 8
which is choice C.