If n is odd then its cube is also odd because odd times odd is odd. When we add 5, an odd number, we get an even number.
If n is even, its cube is also even so adding an odd number makes the sum odd. So if the expression is odd, n must be even.
3 dozen = 36 cookies
20/12 = 1.666666666666667
1.666666666666667 = 1 cookie
(x36)
36 x 1.666666666666667 = 60
It will cost him $60 for 3 dozen cookies
46
When it says f(4) that means x=4
So you then just fill in all the x’s with 4’s and solve as normal
