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 find answers to rational equation problems in algebra.
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How To: Use ">" (greater than) and "<" (less than) symbols

How To: Identify characteristics of a sample during a survey

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How To: Increase a number by a percentage in basic arithmetic

How To: Factor a trinomial with a negative in front

How To: Find the Percent Given Two Numbers

How To: Calculate Faster Than a Calculator

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

How To: Convert Fahrenheit to Celsius with a formula

How To: Convert between diameter and radius

How To: Find the area of a parallelogram using geometry

How To: Find percent by mass & percent composition

How To: Simplify a complex fraction w/ binomial denominators

How To: Solve percent proportions

How To: Remember "greater than" & "less than" symbols

How To: Do long division without a calculator

How To: Find the area of a triangle when given 2 sides & angle

How To: Calculate the area of a parallelogram

How To: Divide small numbers by big numbers

How To: Find the equation of a circle given: center & tangent
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