8

Set 5: Trigonometry

Explanation

Answer: C

If x=4x = 4, what is the value of 6x+46x + 4?

A.

14

B.

18

C.

28

✓ Correct
D.

38

Detailed Explanation

Choice C is correct. 1. Substitute x=4x = 4 6(4)+46(4) + 4 =24+4= 24 + 4 =28= 28 Therefore, 6x+4=286x + 4 = 28 when x=4x = 4.

Key Steps:

Apply the appropriate mathematical formula

The correct answer is 28

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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