Line ab intersects line df. which statement shows that the two lines are perpendicular?

a- line ab and line df are on the same plane.

b- line ab and line df intersect only once

c- line ab and line df intersect at a 90 angle

d- line ab and line df intersect at a 180 angle

Which value of c would make he following expression completely factored? 8x+cy

Ajar contains a mixture of 20 black marbles, 16 red marbles, and 4 white marbles, all the same size. find the probability of drawing a white or red marble on the first draw. 125 12 01 next question ask for turn it in

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.