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Chris drove 250 miles using 9 gallons of gas. At this rate, how many gallons of gas would he need to drive 275 miles?

Answer 1

Riley Anderson

Chris would need #9.9# gallons of gas.

To drive #250# miles, Chris uses #9# gallons of gas

Hence to drive #1# mile he uses #9/250# gallons of gas

and to drive #275# mile he uses #9/250xx275# gallons of gas

i.e #9/(10cancel250)xx11cancel275# - dividng by #25#

or #(9xx11)/10=99/10=9.90# gallons.

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Answer 2

Jeremiah Andrews

To find out how many gallons of gas Chris would need to drive 275 miles at the same rate, we can set up a proportion:

( \frac{250 \text{ miles}}{9 \text{ gallons}} = \frac{275 \text{ miles}}{x \text{ gallons}} )

Solving this proportion:

( 250 \times x = 9 \times 275 )

( 250x = 2475 )

( x = \frac{2475}{250} )

( x = 9.9 )

So, Chris would need approximately 9.9 gallons of gas to drive 275 miles at the same rate.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.