She bought 4 English books and 2 math books
27 x 4 = 108
23 x 2 = 46
108+46=154
        
             
        
        
        
Answer:
This percent is a decrease 
11 people quit 
Step-by-step explanation:
 
        
             
        
        
        
If you are working with time or days, you can't put in a negative value because if you are doing an experiment, you can't go back in time to do that experiment to gather data. (Time for the most part considered to be an input value so that's why I used it as an example.)
 
        
             
        
        
        
Answer:
50 square units
Step-by-step explanation:
Using the formula provided,  , substituting the height (5), b1 (8) and b2 (12), we can solve for the formula.
, substituting the height (5), b1 (8) and b2 (12), we can solve for the formula.

Hope this helped!
 
        
                    
             
        
        
        
To compare these numbers, you must first put them into one format.  Since you have mixed numbers, you may have to find and use the LCD.
-2.5, 1/5, 10, -12/4, 18/5, 10 could be simplified somewhat immediately:
-2.5, 1/5, 10, -3, (3 3/5)   This set of numbers is simple enough so that you could rearrange them in ascending order mentally:
-3, -2.5, 1/5, (3 3/5), 10
In this case the number of elements in this set is odd, so all you have to do is to select the MIDDLE element:  1/5.
The median is 1/5.
You MUST learn this procedure (arranging the set elements in ascending order and selecting the middle element) so that you can apply it yourself.