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 graph and solve a system of linear inequalities in algebra.
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How To: Determine if a point lies on a line in standard form

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

How To: Solve quadratic equations by factoring in math

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

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

How To: Find the Percent Given Two Numbers

How To: Do long division without a calculator

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

How To: Find the area of a parallelogram using geometry

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

How To: Find the formula of a piecewise function given a graph

How To: Find the 100th term in a sequence

How To: Multiply & Divide Numbers (Basic Elementary Math)

How To: Simplify fourth roots

How To: Find the equation of a line given 1 point

How To: Find the slope from a set of points

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How To: Solve percentages without a calculator

How To: Use a mean and scatter plot for Statistics
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