Question

A van travels 80 miles on 4 gallons of gas. At that rate, how much gas will it need to travel
200 miles?
[A] 10 gal [B] 1.6 gal [C] 9 gal [D] 12 gal

Answer 1

If it travels 80 miles on 4 gallons, how many miles per gallon does it get? Once you know that, divide 200 miles by the miles per gallon figure to find the number of gallons.

Answer 2

Another approach:

80:4 is as 200:x

Cross-multiply and solve for x
\[\frac{80}{4} = \frac{200}{x}\]\[80x = 200*4\]\[x=?\]

Answer 3

800

Answer 4

Are you sure about that?

\[80x = 800\]\[80*800 = 800\]That answer doesn't quite seem to fit.

Answer 5

If \[80x=800\]divide both sides of the equation by 80
\[\frac{80x}{80} = \frac{800}{80}\]Cancel common factors\[x=\frac{800}{80} = ?\]

Answer 6

10 right??

Answer 7

Bingo!

Answer 8

yay thnks