Set 5: Trigonometry

Explanation

Answer: C

If $x = 3$ , what is the value of $2x + 4$ ?

✓ Correct

Detailed Explanation

Choice C is correct. 1. Substitute $x = 3$ $2(3) + 4$ $= 6 + 4$ $= 10$ Therefore, $2x + 4 = 10$ when $x = 3$ .

Key Steps:

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Apply the appropriate mathematical formula

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The correct answer is 10

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.

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

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