About the same as the previous posting
a = gallons used up by the 20 mpg car
b = gallons used up by the 30 mpg car
we know on that week they both consumed 65 gallons altogether, therefore 
a + b = 65.
we also know that they did a combined mileage of 1550.  Now, in 1 gallon the 20mpg car does 20(1) miles, in 2 it does 20(2) miles, in 3 gallons it does 20(3) and in "a" it does 20(a) or 
20a miles.
likewise, the 30mpg car does 30(b) in b gallons, or 
30b miles.
Therefore, 
20a + 30b = 1550.

how many gallons is it consumed by the 30mpg car?  well b = 65 - a.
 
        
        
        
Answer:
cxc joy
Step-by-step explanation:
jouning
 
        
             
        
        
        
<span>The answer should be 4.5 because they used AT LEAST 32 miles per gallon. So, 144/32=4.5 and since it's AT LEAST 32, 4.5 is the max amount used.</span>
        
                    
             
        
        
        
X= -8       that uis your answer for that question :)
        
                    
             
        
        
        
Answer:
Eric rode 2 more miles per week than Kim rode. 
Step-by-step explanation:
Find how many miles per week Kim rode by dividing the number of miles she rode by the number of weeks:
135/9
= 15
Find how many miles per week Eric rode:
102/6
= 17
So, Kim rode 15 miles per week and Eric rode 17 miles per week.
The answer is Eric rode 2 more miles per week than Kim rode.