Identify the operation to perform to the equation to isolate the variable.2x = 8

A. Divide by 2
B. Add 2
C. Multiply by 2
D. Subtract 2


Answer: A

Mathematics

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A. I B. II C. III D. IV

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Solve the problem.Radioactive carbon 11 has a half-life of 20 minutes. If there are 200 grams present at the start of our experiment, how many grams will remain after 10 minutes?

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A. Tens place B. Hundreds place C. Hundredths place D. Thousands place

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