ISEE Mathematics Achievement Question 4: Answer and Explanation

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Question: 4

4. Let ‡x = 3x – 7. What is the value of ‡6?

A. 11
B. 17
C. 20
D. 25

Correct Answer: A

Explanation:

A "weird symbol" defined to equal an equation is simply a different form of function notation, so plug in numbers as directed by the defined equation. As ?x = 3x – 7, ?6 = 3(6) – 7 = 18 – 7 = 11.

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