# Formulas

A collection of math formulas for lookup and reference. Each formula contains a series of steps to produce a desired result.

### Algebra

Quadratic Formula |

Slope |

### Geometry

### Linear algebra

Determinant of Three by Three Matrix |

Determinant of Two by Two Matrix |

### Probability

N Choose R Combination |

N Choose R Permutation |

Permutation |

Arithmetic Mean |

Conditional Probability |

Expected Value of Continuous Distribution |

Expected Value of Discrete Distribution |