The cost of a personal computer is $700 and its value is depreciating with time according to the formula dV = -500(t + 1)-2 dt where V dollars is its value t years after its purchase. What is its value 3 years after its purchase?

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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.