Twelve classmates are taking a picture side by side.  A. In how many ways can they take the picture if there are not restrictions? B.  In how many ways can they take the picture if two best friends must stand side by side?  C. Using the results from A and B, in how many ways can the best friends not stand side by side?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.