Question 14 EIn how many ways can you invite one or more of your five friends in a party? Response: [none ] Edit Question 15 How far is the intersection of the lines 4x - 5y = 26 and 3x + 7y + 2 =0 from the origin. Response: [none] Edit Question 16 The distance between foci of an ellipse is 6 and its major axis is 10. Find its eccentricity. Response: [none ] Edit Question 17 Find the probability of getting exactly 12 out of 30 questions on the true or false questions, Response: [none ] Edit Question 18 The equation x*2 + y*2 - 4x + 2y - 20 =0. Find its center. Response: [none ] Edit