Simplify: 4.2(3.9r – 5.9s) + 7.9s – 9.53r
A. 16.88r + 6.85s
B. 10.82r + 31.15s
C. 10.82r – 31.15s
D. 6.85r – 16.88s

Write a corresponding real world problem to represent 2x - 125=400

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

Abcd is a square. what is the measure of angle bac