Set 2: Trigonometry

Explanation

Answer: B

Solve for $x$ : $4(x + 9) = 84$

✓ Correct

Detailed Explanation

Choice B is correct. 1. Start: $4(x + 9) = 84$ Divide by 4: $x + 9 = 21$ Subtract 9: $x = 12$ Therefore, $x = 12$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 12

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.

Master all sections for your best SAT score