Set 3: Trigonometry

Explanation

Answer: B

If $x = 10$ , what is the value of $5x + 7$ ?

✓ Correct

Detailed Explanation

Choice B is correct. 1. Substitute $x = 10$ $5(10) + 7$ $= 50 + 7$ $= 57$ Therefore, $5x + 7 = 57$ when $x = 10$ .

Key Steps:

•

Apply the appropriate mathematical formula

•

The correct answer is 57

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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