Question

Please help me it would be very much appreciated!

Answer 1

28

Explanation:

So in this question, we know that n is now 21. So if we substitute n with 21, we get

`-2 +(3)/(2)(21 -1)`

`= -2 + (3)/(2)(20)`

`=-2+(60)/(2)`

`=-2 + 30`

`= 28`

Which is our answer.