DVDs are on sale for $24 each. Which expression can be used to find the cost in dollars of buying 4 DVDs? Group of answer choices

(4 + 20) x (4 + 4)

(4 x 20) x (4 x 4)

(4 x 20) + (4 x 4)

( 4 + 20) + (4 + 4)

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

What does the sign of the slope tell you about a line?

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so