SAT Math Multiple Choice Practice Question 385: Answer and Explanation

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Question: 385

11. For , let ?x be defined by the equation . Which of the following is equivalent to

A. ▽2
B. ▽3
C. ▽6
D. ▽8
E. ▽9

Correct Answer: A

Explanation:

A Given that ▽x = 3x – 3, find ▽7.

Be careful not to pick answer choice (B) ▽3, because , not 3. Answer choice (A) ▽2 is correct, because .

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