A vendor sells 18 greeting cards in an hour. Some of the cards have photographs on them. Others have illustrations. The cost is $2 for cards with photos and $3 for cards with illustrations. The total cost of the
cards is $44.
Part A: Write a system of equations that you can use to find the number x of cards with photographs and the
number y of cards with illustrations sold.
Part B: Find how many of each type of card sold.

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

Someone answer asap for ! max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a. the median of max’s data is 250 b. more than half of the data points max recorded were 177 centimeters. c. a data point chosen at random is as likely to be above the mean as it is to be below the mean. d. every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

What is 140% of 25? because i need