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Covering pre-algebra through algebra 3 with a variety of introductory and advanced lessons.


Learn basic geometric shapes, properties, formulas, and problem solving techniques.


Look here for more advanced topics starting with pre-cal and extending through multivariable calculus.


Sines and cosine, angles and formulae.


Here's where we cover basics, like the mean & and median, along with links to more advanced statistics topics.


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Recently Asked Math Questions

Trouble with even and odd functions Wednesday November 14, 2018
I have this question: If f is an odd function and g is an even function, please find the value of the following interval 9 to -9 (f(x) +g(x)) dx. Now I know that if f is odd then that f(x) would

Test Statistic for Proportion Formula help. Tuesday November 13, 2018
Sup everyone, first post. *4) According to the CDC, 31% of all traffic related deaths were alcohol-related. A sheriff notices that, among the 44 traffic deaths in her county in the past 3 years, 21

Covariance of the Sample Mean of Two Random Vectors Tuesday November 13, 2018
Hello everyone, This is not homework, it's a real problem I encountered in data analysis. I'll try to state the problem as clearly as possible, while removing extraneous information about the

percentage and money problem Tuesday November 13, 2018
need help on how to solve it? Zach went into store A and spent 40% of his money. He then spent 25% of his remaining money at store B. He then spent all but 20% of what was left. He ended up with

twice continuously differentiable Tuesday November 13, 2018
Hello, I was wondering if someone could explain to me how I should interpret the following: 'To ensure the existence of a unique closed-form solution, the additional assumption is made that the