One day when terry went to school the temperature outside was –15 degrees fahrenheit. in terry's classroom the temperature was 68 degrees fahrenheit. how many more degrees was it inside the building than outside?

it is a 83 degree difference

Step-by-step explanation:

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in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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