Set 3: Trigonometry

Explanation

Answer: D

Solve for $x$ : $2(x + 6) = 30$

✓ Correct

Detailed Explanation

Choice D is correct. 1. Start: $2(x + 6) = 30$ Divide by 2: $x + 6 = 15$ Subtract 6: $x = 9$ Therefore, $x = 9$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 9

Why others are wrong:

A: This would give an incorrect result. Choice A is incorrect and may result from a calculation error.

B: This would give an incorrect result. Choice B is incorrect and may result from a calculation error.

C: This would give an incorrect result. Choice C is incorrect and may result from a calculation error.

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