I think it is 30.48 because i looked it up
Its simple (n-12) because n is the variable and since it says fewer, then that means less than, which is subtracted by the number given which would be 12. Hope this helps! XD
A line that passes through an angle and splits it into two equal adjacent angles
15=3b
15/3 = 3b/b
5= b
Isolate the variable by diving 3 on both sides
Start at 5 and go up 3 and move 4 to the right