Answer:
x = 4
Step-by-step explanation:
The exterior angles of an octagon equal 45 degrees. So if the angles are 11x+1, set it equal to 45 and solve for x.
11x+1 = 45
11x = 44
x= 4
Each would get 2243.75 books (there is a remainder) use a calculator if you need to.
Input 7 for every x so
f(7) = -2 (7)^2 +4
f(7) = -2(49) +4
f(7) = -98 +4
f(7) = -94
Answer:
186.3
To find the answer you have to do inverse operations
9×20.7=186.3
186.3÷20.7=9
To find the area of a sector of a circle use the next formula:

As the given circle has a outside angle 90º (it is not part of the sector of the circle) subtract the 90º from 360º (total angle of a circle) to find the angle of the sector:

Find the area of the sector with angle 270º:

Then, the approximate area of the given sector of a circle is 284.955 square inches