Answer:
$42.09
Step-by-step explanation:
1. multiply the cost per gallon (3.45) by the gallons purchased (12.2)
     3.45*12.2 = 42.09
 
        
             
        
        
        
  x3[x+4y=1]
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3x+5y=10
-1y=-9
x-1 [-1y=-9]
y=9
        
                    
             
        
        
        
Answer:
-2
Step-by-step explanation:
10x+30+9x+4=x-5+3
19x+34=x-2
18x=-36
x=-2
 
        
             
        
        
        
Answer:
2x-y= -3
Step-by-step explanation:
2x=y-3
2x-y= -3 
There is an app called photomath and u can take pictures of math problems and get the answer
 
        
                    
             
        
        
        
Answer:
0.25
Step-by-step explanation:
If one quart equals 32 ounces, then we multiply the volume by 32