Answer:
9 gallon of gas
Step-by-step explanation:
When distance covered is 378 miles, they have used 14 gallons of gas
We need to find how much gas will they need to finish the trip if 243 miles left to drive on the trip.
378 miles = 14 gallons of gas
For 1 mile,
1 gallon of gas is used for 
For 243 miles,

Hence, for 243 miles 9 gallon of gas is used.
Answer:
$0.21/lb
Step-by-step explanation:
We are to find the price per pound:
Number of tons given = 2 tons;
1US ton contains 2000lb
2 tons will have mass of 2 x 2000 = 4000lb
price = $840
So';
Price per pound =
= $0.21/lb
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I would say that you cannot answer the question if you dont know either the X-value or Y-value. You need to know at least one of them to figure out the other.