Your house is 2 km due north of a stream that runs east-west. Your aunt's house is located 12km west and one km north of your house. Everyday, you go from your house to aunt's, but first, visit the stream to get fresh water for aunt.  What is the shortest distance of the route?

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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.