Create an expression equivalent to 1/5n−4/5

There are many expressions that are equivalent to 1/5n−4/5.

One might be:

1/5n + ( - 4/5 )

Step-by-step explanation:

The expression 1/5n + ( - 4/5 ) is equivalent to 1/5n−4/5.

Positive and a negative is always a negative.

You can add two positive sign and a negative :

1/5n + + (-4/5)

Step-by-step explanation:

1) If the diameter is included:

2(4)*pi/2+2(4)

4pi+8

2)If it isn't included

2(4)*pi/2

4pi