Answer:
Step-by-step explanation:
a) x>0 → items can not be negative 
b) c(2,000) = 5,000+1.3(2,000) = $7,600
c)5,000+1.3x<10,000
5,000-5,000+1.3x<10,000-5,000
1.3x<5,000
x<3846 items
 
        
             
        
        
        
B. All rectangles are parallelograms! And C. All equilateral triangles are isosceles! :-)
        
                    
             
        
        
        
Answer:
0.354
Step-by-step explanation:
 
        
             
        
        
        
So, if k/9=3/9, then k=3, because it is a variable substituting 3. :D Hope I could help! 
        
             
        
        
        
2 + 2 x 4 - 16 = -6
How?
Use PEMDAS.
The first step that shows up is multiplication.
2 + 8 - 16
Next comes Addition.
10 - 16
-6