An eye doctor charges an exam fee, plus a charge for the number of boxes of contact lenses purchased. Lindsey had an exam and ordered 2 boxes of contact lenses. She paid $112.97. Josh had an exam and ordered6 boxes of contact lenses. He paid $272.93. How much is the exam fee (in dollars.cents)?

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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.