Give an example of a real-world situation that you can model with a horizontal line. what is the rate of change for the situation

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The measure of an angle is 117°. what is the measure of a supplementary angle?

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.