Suppose that a finite class contains 40% freshmen, 20% sophomores, 10% juniors, and the rest seniors. suppose that 20% freshmen, 20% sophomores, 60% juniors, and 60% of seniors pass the class. answer the following questions: given that the student is a sophomore, what is the probability that she fails the class? equation editorequation editor

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?