is  1 /2 b − 1 + 1 /2 b − 1 1 /2 b − 1 1 /2 b - 1 + 1 2 b - 1 1 2 b - 1 equivalent to 3 ( 1 /2 b ) − 3 3 ( 1 /2 b ) - 3

In the image, point a marks the center of the circle. which two lengths must form a ratio of 1 : 2? (options are in the images since thought they were harmful phrases)

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?