How many sides do 5 hexagons and 4 heptagons have in all?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

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

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?