Set 4: Trigonometry

Explanation

Answer: A

If $x = 3$ , what is the value of $5x + 12$ ?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Substitute $x = 3$ $5(3) + 12$ $= 15 + 12$ $= 27$ Therefore, $5x + 12 = 27$ when $x = 3$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 27

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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