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Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

Which graph represents the function g(x) = |x + 4| + 2?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).