Answer:
(-7,-6)
Step-by-step explanation:
![x = \frac{ -5 - 9}{2} = - 7 \\ \\ y = \frac{ - 9 - 3}{2} = - 6 \\](https://tex.z-dn.net/?f=x%20%3D%20%20%5Cfrac%7B%20-5%20-%209%7D%7B2%7D%20%20%3D%20%20%20-%207%20%5C%5C%20%20%5C%5C%20y%20%3D%20%20%5Cfrac%7B%20%20-%209%20-%203%7D%7B2%7D%20%20%3D%20%20-%206%20%5C%5C%20%20)
Okay, it's the equation to how find area any other way. A=L×W
This means *picture above*
So then you count over each line meaning 1.
This means L=9 and a 1/2. Since its in between the 2 an 3 on the x-axis.
Now for W or width. It equals 3 since you can count 2 lines and one either ends of the polygon is 1/2 each this creates one when added together.
All you do from there is multiply 9 and 3. This should give you A=area.
81, you just type in a calculator 3^4 which would also equal 3x3x3x3
C = 25 + 7h...c = 81
81 = 25 + 7h
81 - 25 = 7h
56 = 7h
56/7 = h
8 = h......so at 8 hrs, it will cost $ 81
For a 90 Degree rotation the original x value becomes the new y value and the new x value is the opposite of the original y value.
The answer would be (-6,-7)