PSAT Math Multiple-Choice Question 16: Answer and Explanation

Question: 16

If , then which of the following is equal to bc?

• A.
• B.
• C.
• D. 18ad

Correct Answer: C

Explanation:

C

The question asks for what is equivalent to bc. To solve, isolate bc on one side of the equation. Start by cross-multiplying to get 18ad = 20bc. Divide both sides by 20 to get . Reduce the fraction to get . The correct answer is (C).