# 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* = 3*x* – 3, find ▽7.

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