Prove the segments joining the midpoint of consecutive sides of an isosceles trapezoid form a rhombus.

Find the coordinates of midpoint D.

A: (–2a – 2b, c)

B: (2a – 2b, –c)

C: (–a + b, –c)

D: (–a – b, c)

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

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) .

Lines a and b are parallel. what is the value of x? -5 -10 -35 -55