Respuesta :

kritika3375

Step-by-step explanation:

Given

n = 5

1. 9n - 9

= 9 * 5 - 9

= 45 - 9

= 36

2 . (3n + 5n) 10

= ( 3 * 5 + 5* 5)10

= 40* 10

= 400

3 . 12 * n/2

= 12 * 5 / 2

= 6 * 5

= 30

Hope it will help :)