Helene drove 70 km on 4 L of gasoline. Which of the following would be an equation to help you find out how far she can travel on a full tank of 30 L?

Question

mathstudent55 · Answer

Where are the choices?

mathstudent55 · Answer

You can set up a proportion:

$ \dfrac{70~km}{4~L} = \dfrac{x}{30~L} $

anonymous · Answer

a 30\70 = 4\x
 
 B. 70\4 = x\30
 
 
 C.70\30 = x\4
 
 
 D.70\4 = 30 \ x

mathstudent55 · Answer

If you solve the proportion for x, you'll get the distance the car can go with 30 L of gasoline. You can use cross multiplication.

mathstudent55 · Answer

Compare the choices with the proportion above. Leave the units out of my proportion.