Which expression is equivalent to -3(2m - 1) - n?

6m - n - 3
6m - n + 3
-6m - n - 3
-6m - n + 3

I'm confused on this could anyone me and show me what i need to do to solve it.

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices

The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!