You organize a garage sale. You have $30 at the beginning of the sale. You earn an average of $20 per hour. Write an equation(slope-intercept) that represents the amount of money y you have after x hours

How much money will you have earned after 2 hours?

you will have 70, having earned 40 in addition to the 30 you had beforehand

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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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