Anyone know the answer to this question?

For what values of b will f(x)= logbx be a decreasing function? (16 )

The perimeter of a rhombus with a side of 6 is 24

Which functions are even? check all of the boxes that apply. f(x) = x4 – x? f(x) = x2 – 3x + 2 f(x) = (x - 2) f(x) = x done