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math.com

free math lessons and math homework help from basic math to algebra, geometry and beyond. students, teachers, parents, and everyone can find solutions to their math problems instantly.

quickmath.com

quickmath allows students to get instant solutions to all kinds of math problems, from algebra and equation solving right through to calculus and matrices.

purplemath.com

Basic trig identities are formulas for angle sums, differences, products, and quotients; and they let you find exact values for trig expressions.

freemathhelp.com

I was told that the union of [0.9], [0.09], [0.009], [0.0009] ... is [0.999 ...] 1) Is this true? 2) If so, then would this be a real number, why or why not? 3) If it is real, then isn't it the next real number less than 1 (which isn't suppose to exist). 4) Finally, what does this say about...

algebrahelp.com

affordable, top-rated private tutors in 300+ subjects on wyzant. trusted by 3 million students with our good fit guarantee.

aaamath.com

aaa math features a comprehensive set of interactive arithmetic lessons. unlimited practice is available on each topic which allows thorough mastery of the concepts.

mathworld.wolfram.com

A connected graph G is distance-regular if for any vertices x and y of G and any integers i,j=0, 1, ...d (where d is the graph diameter), the number of vertices at distance i from x and distance j from y depends only on i, j, and the graph distance between x and y, independently of the choice of x and y. In particular, a distance-regular graph is a graph for which there exist integers b_i,c_i,i=0,...,d such that for any two vertices x,y in G and distance i=d(x,y), there are exactly c_i...

coolmath.com

cool math has free online cool math lessons, cool math games and fun math activities. really clear math lessons (pre-algebra, algebra, precalculus), cool math games, online graphing calculators, geometry art, fractals, polyhedra, parents and teachers areas too.

mathportal.org

Free step-by-step polynomial factoring calculators.