Which shows the result of a correct substitution for the system y=2x+3 and 3x+2y=9? o

A. y= 2y + 3

B. 3(2x + 3) + 2y = 9

C. 3x + 2(2x + 3) = 9

o

D. 2x + 2y = 3

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)

00 points ! missy’s rotation maps point k(17, –12) to k’(12, 17). which describes the rotation? 270° counterclockwise rotation 90° counterclockwise rotation 90° clockwise rotation 180° rotation

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).