Given ΔACD and ΔABE, what is AB? Triangles ACD and ABE are right angle triangles. Angle D and E are right angles. Point B is on hypotenuse. AC and point E is on base AD. The length of AD is 15. The length of ED is 9 and BC is 12.

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14