Set 5: Trigonometry

Explanation

Answer: B

Solve for $x$ : $4(x + 3) = 40$

✓ Correct

Detailed Explanation

Choice B is correct. 1. Start: $4(x + 3) = 40$ Divide by 4: $x + 3 = 10$ Subtract 3: $x = 7$ Therefore, $x = 7$ .

Key Steps:

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Apply the appropriate mathematical formula

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The correct answer is 7

Why others are wrong:

A: This would give an incorrect result. Choice A 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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