3

Set 2: Trigonometry

Explanation

Answer: C

If 8x+15=478x + 15 = 47, what is the value of xx?

A.

8

B.

14

C.

4

✓ Correct
D.

2

Detailed Explanation

Choice C is correct. 1. Start: 8x+15=478x + 15 = 47 Subtract 15: 8x=328x = 32 Divide by 8: x=4x = 4 Therefore, x=4x = 4.

Key Steps:

Apply the appropriate mathematical formula

The correct answer is 4

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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