62283
AssignmentMultiple Choice

Inequalities in One Variable

Question 62283 • Online Algebra, Function, Number A

The temperature of magnesium must be at least 650 degrees for the metal to melt. A sample of magnesium is currently 255 degrees. The temperature of the magnesium is increased by 10 degrees every minute. Which inequality shows the number of minutes (m) needed to raise the temperature to the melting point?

Answer
A
m > 39.5
B
m ≥ 39.5
C
m > 87.5
D
m ≥ 87.5

Explanation

The temperature after m minutes is 255 + 10m degrees. It must be at least 650 degrees, so 255 + 10m ≥ 650. Subtracting 255 and dividing by 10 gives m ≥ 39.5, so the correct choice is “m ≥ 39.5.”

AI-written and checked against the verified answer.

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