Answer:

Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
The fourth vertex would be at point (-9,1).
The slope from (5,-4) to (3,4) is -8/2 or -4.
So I did that with (-7,-7) to the fourth vertex to get the answer.
There are 80.5 tens in 805