Solve and check: 3 x2 + 5x + 6 + x − 1 x + 2 = 7 x + 3 x = is a solution. x = is an extraneous solution.

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An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e.g. 98.7654). x f(x) 0 1 2 3

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?