10. A ladder 13 ft. long leans against a vertical wall. If the top slides down at 1.5 ft. per sec., how fast is the angle of elevation of the ladder decreasing, when the lower end is 12 ft. from the wall?

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A: topic-equations

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.