Add or subtract the radical expressions. Assume that all variables under radicals represent positive values. Simplify your answer. 
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Q74: A model rocket is launched from the
Q75: Add or subtract the radical expressions. Assume
Q76: A model rocket is launched from the
Q77: Solve the quadratic equation. Q78: Find the perimeter of the isosceles triangle. Q80: Simplify the radical then approximate it to Q81: Divide rationalize the denominator and simplify. Q82: To rationalize the denominator means to get Q83: The distributive property Q84: Multiply the radicals and simplify. 
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