9 is the answer
Step by step
....
You can factor -80 as

So, we have

The square root of a product is the product of the square roots:

Since
and
, we have

Answer:
20% of 160 is 32
Step-by-step explanation:
I do not have your choices but all the statements that I can think of is the following: A point in the x,y form has two dimensions, a plane has a definite beginning and end, the line has one dimension or length, and finally a point consists of an infinite set of the lines <span />