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 work with and solve rate problems in algebra using the distance formula.
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How To: Find the Percent Given Two Numbers

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

How To: Do long division without a calculator

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find a number given Its percent

How To: Figure out the domain & range of a piecewise function

How To: Calculate Faster Than a Calculator

How To: Find density using the water displacement method

How To: Find the slope of a line given 2 points with fractions

How To: Calculate the area of a parallelogram

How To: Find a missing coordinate given: coordinate & equation

How To: Find the Slope Given 2 Ordered Pairs

How To: Determine the age of a fossil using carbon14

How To: Find the opposite and absolute value of a number

How To: Find the area & perimeter of triangles & squares

How To: Convert yards to inches with simple arithmetic

How To: Find the area of a parallelogram using geometry

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Convert Fahrenheit to Celsius with a formula

How To: Deal with brackets in polynomials
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