Respuesta :

A. Is 6x+9x and 15x
B. Is 4 times 1 plus 4 times 9y and 4+36y

a) the first and last one : 6x + 9x and 15x

b) second and third one : 4*1 + 4*9y and 4 + 36y

pls mark brainliest!