On the most recent exam in her course, of the 48 students in her 8:35am section, 7 turned in exam forms that could not be read and 4 failed to correctly bubble in their ID number. The 60 students in her 9:40am section turned in 8 exam forms that could not be read and 9 failed to bubble in an ID number. Using only the sample from her 9:40am section, what is the 90% confidence interval for the proportion of students who fail to bubble in ID numbers correctly

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.