11 skirts since you can use 3/4 on each yard of 9. Then you get a remander of 2, 3/4! 9 + 2 is 11.
Answer:

Step-by-step explanation:
To find the inverse of a function, what I like to do is to switch the places of x and y, and then try to isolate y again like so:



Hope this helps!
Answer:
6
Step-by-step explanation:
Chords within a circle are proportional. Proportional means that they form equal ratios. To solve for y, set up a proportion.
The ratios we will create will be
where each long and short form an angle.
So write:

To solve, cross multiply numerator with denominator.
12(4) = 8(y)
48=8y
6=y
7/36
Multiply the top together and then the bottom together and the final numbers on top and bottom is your answer.