The perimeter of a backyard basketball court with four sides is 90 feet. Two sides of the court are each 20 feet long. One side of the court is 25 feet long. What is the missing side length? 20 feet 25 feet 30 feet 50 feet

step-by-step explanation:

1) is right

step-by-step explanation:

17.08

correct me if i am wrong.

step-by-step explanation:

to determine whether a given function is even, we simply substitute x with -x in the expression. if the result after simplification is identical to the original equation, then the function is said to be even other wise odd.

f(-x) = (-x)^2 - (-x) + 8

      = x^2 + x +8

the resulting function is not identical to the original one;

f(-x) ≠ f(x)

therefore, f(x) is not an even function