Which pair of lines is parallel? a. y=-2x+4 and y=2x-1 b. y=1/2x-1 and y=1/2x+10 c. y=x+3 and y=-2x+3 d. y=3x+5 and y=1/3+2

In the coordinate plan (-6,9) b (3,9) c (3,3) def is shown in the coordinate plan below

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Secant ac and bd intersect at point e inside f what is the measure of aed if measurements cd equals 30 a b is 50 and cb is 170