What's a repeating bar?

When you do a division problem and the quotient (answer) ends up being with a number that just keeps repeating say like when you divide

20 ÷ 9 = 2.22222222222

In this case you don't have to write all these 2s, you just put a line on top of the second 2 after the decimal to show that it repeating.     

     _ 
2.22

That line is a repeating bar.

Hope this helps. :)

answer: no

step-by-step explanation:

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13