Set 15: Linear Equations (Advanced)

Explanation

Answer: C

A phone plan charges a $25 monthly fee plus 0.$ 10 per text message. If Maria's total bill was $45, how many text messages did she send?

What is the number of text messages Maria sent?

150

250

200

✓ Correct

450

Detailed Explanation

Choice C is correct. Set up the equation: 25 + 0.10 x = 45. Subtract 25 from both sides to get 0.10 x = 20. Divide both sides by 0.10 to get x = 200.

Key Steps:

•

The correct answer is 200

Why others are wrong:

A: Choice A is incorrect and may result from a calculation error.

B: Choice B is incorrect and may result from a calculation error.

D: Choice D is incorrect and may result from a calculation error.

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