Fred and Selma's age problem
Fred is 4 times as old as his niece, Selma. Ten years from now, he will be twice as old as she will be. How old is each now?
How do you simplify this into simplest radical form?
2√63 - 6√28 + 8√45
Domain of a function
What is the domain of f(x) = x² + 2x + 1 ?
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