Set 5: Trigonometry

Explanation

Answer: A

If $x = 7$ , what is the value of $8x + 7$ ?

✓ Correct

Detailed Explanation

Choice A is correct. 1. Substitute $x = 7$ $8(7) + 7$ $= 56 + 7$ $= 63$ Therefore, $8x + 7 = 63$ when $x = 7$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 63

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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