Simplify the expression: 1/1+cot^2x
a. sec^2x
b. csc^2x
c. sin^2x
d. cos^2x
e. tan^2x

Which pair of lines is parallel? a. y=4x+1 and y+4=5 b. y=-2+x and 2y-2x=-2 c. y=1/4x + 2 and y-2=1/2x d. y=1/5x+1 and 5y+x= 10

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Give me the equations of two lines that have the same slope but are not parallel.