Set 5: Trigonometry

Explanation

Answer: A

Solve for $x$ : $3(x + 9) = 60$

✓ Correct

Detailed Explanation

Choice A is correct. 1. Start: $3(x + 9) = 60$ Divide by 3: $x + 9 = 20$ Subtract 9: $x = 11$ Therefore, $x = 11$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 11

Why others are wrong:

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.

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

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