Sam wants to leave an 18% tip for his dinner. The bill is for $23.50. Which equation could be used to find the total amount that Sam should pay?

23.5 = 0.18x

x = (0.18) (23.5)

x = (23.5) (1.18)

1.18 = 23.5x

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Two numbers are reciprocals if their product is equal to 1. If x and y are reciprocals and x > 1, then y must be?

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Round 12,406.4578 to the nearest thousands

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