Which expression(s) have a greatest common factor (GCF) of 3xy2 with 42xy4? Select all that apply. A. 6x2y2 B. 15xy2z C. 27x3y2 D. 9xy3

Polygons efgh and e′f′g′h′ are shown on the coordinate grid: what set of transformations is performed on efgh to form e′f′g′h′? a. a translation 1 unit to the left followed by a 90-degree counterclockwise rotation about the origin b. a translation 1 unit to the right followed by a 90-degree counterclockwise rotation about the origin c. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the right d. a 90-degree clockwise rotation about the origin followed by a translation 2 units to the left

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

The length of the line segment joining the midpoints of sides ab and bc of the parallelogram abcd is 10. find the length of diagnol ac