What is 8 21/40 in decimal form? and need work

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Idon’t understand! use slope intercept form to solve: through: (2,5) slope= undefined

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