From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to apply quadratic functions in algebra.
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How To: Find the Percent Given Two Numbers

How To: Calculate unit rates with basic arithmeitc

How To: Do long division without a calculator

How To: Calculate percent composition for chemistry

How To: Find a number given Its percent

How To: Divide small numbers by big numbers

How To: Find a slope of a straight line with: Ax + By + C = 0

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