An airplane needs to head due north, but there is a wind blowing from the southwest at 40 km/hr. The plane flies at an airspeed of 500 km/hr, To end up due north, the pilot will need to fly the plane degrees west of north

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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.