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I need help with these questions-example-1
User JonM
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9514 1404 393

Answer:

17. 25 mile per gallon

18. Eduardo did should have divided by -4.

Explanation:

17. The least mileage will be had when the most gas is used to go a given distance. For the given distance, the most gas that could have been used (without adding any) is 18 gallons. Then the least mileage is ...

(450 mi)/(18 gal) = 25 mi/gal

__

18. The appropriate method for solving this inequality is ...

-4x/(-4) < 120/(-4) . . . . divide both sides by -4 (and reverse the > symbol)

x < -30

The step Eduardo took of adding 4 will give ...

-4x +4 > 124 . . . . . puts him one step farther away from a solution

Eduardo chose an operation to perform that did not get him closer to a solution.

User Arif Acar
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