On a cross-country trip, a car uses 5 gallons of gas for every 135 miles it travels. How many gallons of gas does the car use if it travels 540 miles? How far can the car travel if it uses 30 gallons of gas?
ok look people like Ms. sue if u on here give us the answer like dang its not that hard-
25 gallons of gas for 600 miles
720 if it uses 30 gallons of gas
the answer is 15
To find out how many gallons of gas the car uses when it travels 540 miles, we can set up a proportion:
5 gallons / 135 miles = X gallons / 540 miles
To solve for X, we can cross multiply and then divide:
5 * 540 = 135 * X
2700 = 135X
Dividing both sides by 135:
2700 / 135 = X
So X = 20. Therefore, the car will use 20 gallons of gas when it travels 540 miles.
To find out how far the car can travel if it uses 30 gallons of gas, we can set up another proportion:
5 gallons / 135 miles = 30 gallons / X miles
Again, we cross multiply and then divide:
5 * X = 30 * 135
5X = 4050
Dividing both sides by 5:
X = 810
Therefore, the car can travel 810 miles if it uses 30 gallons of gas.
a. 135mi/5gal = 27 mi/gal.
540mi * 1gal/27mi =
b. d = 30gal * 27mi/gal =
135/5 = 27 miles per gallon
Can you take it from there?