Given cos theta = -sqrt3/2 and pi/2<=theta<=pi, find tan 2theta

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

Linda loans her friend $250 with a 5% monthly intrest rate. how much was the whole loan?

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