Set 2: Trigonometry

Explanation

Answer: A

If $x = 9$ , what is the value of $8x + 10$ ?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Substitute $x = 9$ $8(9) + 10$ $= 72 + 10$ $= 82$ Therefore, $8x + 10 = 82$ when $x = 9$ .

Key Steps:

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Apply the appropriate mathematical formula

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The correct answer is 82

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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