A car drives on a circular track with a radius of 1 km. At the southernmost point of the course is a radar meter. At a given time, the car is 1/2 km from the meter and the distance between the car and the meter increases by 50 km/h. How fast is the car driving 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.