A car goes 400 miles on 10 gallons of gas.

How many miles can it go on 30 gallons?

Question

A car goes 400 miles on 10 gallons of gas.

How many miles can it go on 30 gallons?

KPalm · Answer

What do you have to do to 10 gallons to make it 30? Do that same thing to 400 miles :)

YRJ8498 · Answer

what is 400+400+400

arricake · Answer

@yrj8498 wrote:

what is 400+400+400

600

YRJ8498 · Answer

no try again

arricake · Answer

@yrj8498 wrote:

no try again

1400

YRJ8498 · Answer

no try again

arricake · Answer

@yrj8498 wrote:

no try again

i give up

YRJ8498 · Answer

400*3

KPalm · Answer

400+400=800...plus another 400 would be?

arricake · Answer

@kpalm wrote:

400+400=800...plus another 400 would be?

1200

YRJ8498 · Answer

Good job but do you know why we added 400 3 times?

arricake · Answer

@yrj8498 wrote:

Good job but do you know why we added 400 3 times?

no

carmelle · Answer

To solve this question mathematically, you have to set up a proportion.

$$\frac{ 400 ~ miles }{ 10~ gallons }=\frac{ x~ miles }{ 30~gallons }$$

To solve, you have to cross-multiply.

$$(10)(x)=(400)(30)$$

You are left with:

$$10x = 12000$$

Divide both sides by 12 to find your final answer.

$$\frac{ 10x }{ 10 }=\frac{ 12000 }{ 10 }$$
$$x=1200$$

That means the car can go 1200 miles on 30 gallons of gas.

carmelle · Answer

Divide both sides by 10* sorry typo