Aradio talk show host is interested in the proportion of adults in his listening area who think the drinking age should be lowered to 18. to make this determination, he poses the following question to his listeners: "do you think that the drinking age should be reduced to eighteen in light of the fact that eighteen-year-olds are eligible for military service? " he asks listeners to phone in and vote "yes" if they agree the drinking age should be lowered and "no" if not. of the 200 people who phoned in, 140 answered "yes." the standard error for the proportion of those who phoned in and answered "yes"
a.0.032.
b.0.00105.
c.0.46.

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.