Set 3: Trigonometry

Explanation

Answer: A

If $x = 7$ , what is the value of $5x + 3$ ?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Substitute $x = 7$ $5(7) + 3$ $= 35 + 3$ $= 38$ Therefore, $5x + 3 = 38$ when $x = 7$ .

Key Steps:

•

Apply the appropriate mathematical formula

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The correct answer is 38

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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