Which of the following is the result of expanding

Which statement best describes how to determine whether f(x) = x squared- x +8 is an even function ?

The triangles are similar. what is the value of x? enter your answer in the box.

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.