2 answers:
            
              
              
                
                
Answer:
12.8
Step-by-step explanation:
Its proportions: 1 pound equals 3.20, 4 poundes equals x. 
3.20 (cost per pound) x 4 (how many pounds) = 12.8 (answer)
 
                                
             
                    
              
              
                
                
Answer:
$12.80
Step-by-step explanation:
Sara bought 4 pounds of coffee.
Each pound (lb) costs $3.20
To find the total cost, multiply the cost per pound ($3.20) with the amount of pounds Sara is going to buy (4): 
4 x 3.20 = $12.80
$12.80 would be the total cost before tax. 
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16+3/7-(12+2/5)=16-12+3/7-2/5=4+(3*5-2*7)/35=4+1/35
        
                    
             
        
        
        
The equation shown on the table is y=2x
        
             
        
        
        
Graph it on the Ti-84 and use the trace function to find the intersection.
The answer is 
(-3,3)
 
        
             
        
        
        
Answer:
x ≤  -259/9
Step-by-step explanation:
Change into a number equation   9(x + 26) ≤ -25
 
        
             
        
        
        
Answer:
radius 2
Step-by-step explanation: