Ellen plans to leave an 18 percent tip with her $23.75 lunch bill. Which of these expressions could she use to determine her total bill? Check all that apply.

An 18% tip is 0.18 times the $23.75 bill, and the total is the bill plus that tip. Choice C shows this directly: 23.75 + (0.18)(23.75). Choice A is equivalent because 1.18 times the bill includes the original 100% plus the 18% tip. Choice B subtracts the tip, and choice D gives only the tip amount.

AI-written and checked against the verified answer.