# algebra

posted by .

a trip of 120 miles required 7 gallons of gas. at this rate how many gallons would be needed at 180?

• algebra -

let x = gallons needed
120 : 7 = 180 : x , or
120/7 = 180/x
x/7 = 180/120
x = 7*3/2
x = 10.5 gallons

## Similar Questions

1. ### algebra

could someone check these answer please? solve the following proportion for x. x/8=5/3=0 rueben drove 300 miles using 14 gallons of gas, at this rate, how many gallons would he need to drive 210?
2. ### algebra

Lucy drove 225 miles using 10 gallons of gas. At this rate, how many gallons of gas would she need to drive 279 miles?
3. ### algebra

If a 204-mile trip took 8 1/2 gallons of gas, how many miles can be driven with a full tank of 20 gallons Thank you for your help and it is appreciated,
4. ### math

rachel drove 260 miles using 12 gallons of gas. at this rate, how many gallons of gas would she need to drive 286 miles?
5. ### math

A car traveled 180 miles and use 6 gallons of gas if the same car traveled 1260 miles under similar conditions how many gallons of gas would be used
6. ### math

Maria needed 5 gallons of gas to fill her​ car's gas tank. The mileage odometer read 34,300 miles. When the odometer read 34,528 Maria filled the tank with 12 gallons. At the end of the​ trip, she filled the tank with 17 …
7. ### algebra word problem

My car gets 19 miles per gallon in the city and 34 miles per gallon on the highway. Suppose I used 12.857 gallons of gas and got an average of 27 miles per gallon for the trip. How many gallons did I use for each part of the trip?
8. ### Algebra

My car gets 13 miles per gallon in the city and 30 miles per gallon on the highway. Suppose I used 15.867 gallons of gas and got an average of 15 miles per gallon for the trip. How many gallons did I use for each part of the trip?
9. ### Math1

The number of gallons g of fuel used on a trip varies directly with the number of miles m traveled . If a trip of 270 miles required 12 gallons of fuel, how many gallons are required for a trip of 400 miles?
10. ### algebra 1

The Olivares family forgot to fill up the gasoline tank of their minivan at the beginning of a long trip. After driving 120 miles, there were 10 gallons remaining in the tank. If their car used fuel at the rate of 1 gallon every 20 …

More Similar Questions