Can someone help me find the midpoint?

(6,-2.5)

Step-by-step explanation:

The formula for the midpoint between two points is:

Now we substitute

We have than (9, -1) is and (3, - 4) is

So:

So, we have:

I can do a graphic explanation if you want.

answer:

it will cost 480 dollars to refurbish the larger wood floor

step-by-step explanation:

as it's a ratio of 4 that costs 384 dollars, divide the price by the ratio

384 / 4 = 96 dollars

96 dollars per unit of the ratio

now to get the price to refurbish the larger wood floor, times the price by the units

96 * 5 = 480

the correct is answer is a 9-sided polygon!