Respuesta :

18. 

= 24^-2 m^4 n^-8/ 16^-2m^-6n^10
= 2m^10 / 3 n^18

answer D. last one

16. y^4x / y^12x
 = y^(4x - 12x)
= y ^-8x
= 1/y^8x

answer 
B. 1 /y^8x

14.
= 3^3x^9y^12z^6
= 27x^9y^12z^6

answer 
D. last one 
x^9y^12z^6