Answer:
-3g-4
Step-by-step explanation:
(-2g+7)-(g+11)= -2g+7-g-11= -3g-4
 
        
                    
             
        
        
        
Answer:
E. 55 hours.
Step by step:
Multiple $15x40, equals $600
Subtract $600 from $937.50, equals $337.50
50% more over 40 hours is $22.50
Divide $337.50 by $22.50, equals 15
Add 15 to 40, equals 45
So she worked 55 hours to get paid $937.50
 
        
             
        
        
        
Answer:
4/5 is NOT equivalent to 45%
Step-by-step explanation:
4/5 = 80%
 
        
             
        
        
        
Since the painting is hung in center of a rectangular wall ,the distance between them on either side will be the same.so we can divide the length of the painting and wall by 2.we will get  2.4/2=1.2 feet and 20/2=10 feet .10-1.2=8.8 feet gives the distance between the right edge of the painting and right edge of the wall
        
             
        
        
        
The standard deviation<u> </u><u>INCREASES</u>
Step-by-step explanation:
Standard deviation is used to show how the points of the data deviate from the mean. The formulae for deriving standard deviation is attached. As seen from the formulae, the greater the variance of the data from the mean, the higher the Standard Deviation. 
The mean of the given data points is $103.4. $450 is way off from this mean meaning that there is a large variance in this data point.