It's the third one because if you look at the other ones
Answer:

Step-by-step explanation:
Use the inverse cosine function.



Answer:
y= -1/3x+9.2
Step-by-step explanation:
I believe that it is 9.2 although it could be another number in the 9's.
The slope is (rise) -1 and (run) 3 and the line crosses the y-intercept at what it looks like 9.2
Original price×(1-discount price)=new price or sale price so
Put x in original price...x(1-45/100)=550
So the original price is 1000
We will have the following:

So, the original quantity was approximately $183 293.75.