12. If 3x + 4y = -1 and x - 2y = 3, then y= a) 1
b) 2
c)-1
d) 3
e) 4

13. If 2x - 4y = 8 and y=2x + 1, then x
a) 2 b) 4
c) -3
d) 3
e) -2

Write 17/20 as a decimal and as a percent.

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

100 points? me its important ‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️‼️