Answer:
6.3feet
Step-by-step explanation:
Given data
Radius= 4feet
The expression for the circumference of a circle is
C= 2πr
Substitute
C=2*3.142*4
C=25.136 feet
Also, a 90° arc is 1/4 of the circumference of a circle
Hence the length of the 90° arc is 
=25.136/4
=6.284 feet
=6.3feet
 
        
             
        
        
        
Your answer would be 1, or 72+25.
What is happening in this case is a negative number is being subtracted from a positive. This means you are taking away a negative. The two negatives cancel each other out, and then it becomes you are adding a positive. 
Another way I like to think about this is the two minus symbols combine together to form a plus sign.
Hope this helped!
 
        
                    
             
        
        
        
All except combine like terms. Since you only have 1 variable.
Hope this helps.
r3t40
 
        
             
        
        
        
By my, calculations this means that there is an estimated number of restaurants that receive a Hawaiian pizza order from their menu and that is 7.5. So out of 100 restaurants, there are 7.5 Hawaiian pizza orders.