Set 5: Linear Equations (Advanced)

Explanation

Answer: B

In $T = -2m + 90$ , $T$ is temperature in Celsius and $m$ is minutes. What is the initial temperature?

✓ Correct

-2

Detailed Explanation

Choice B is correct. Choice A is the correct answer. 1. Initial: When $m=0$ , $T = 90$ . Choice C is incorrect because this is the rate of cooling. Choice D is incorrect because it results from an error in the solution process. Choice C is incorrect because it results from an error in the solution process.

Key Steps:

•

The correct answer is 90

Why others are wrong:

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

C: Choice C 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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