Quadrilateral abcd has side lengths of ab = 2z + 2, bc = 8, cd = 5z – 10, and ad = 8. find the value of z for which quadrilateral abcd is a parallelogram.
a. 1
b. 2
c. 3
d. 4

Assume that a population of 50 individuals has the following numbers of genotypes for a gene with two alleles, b and b: bb = 30, bb = 10, and bb = 10. calculate the frequencies of the two alleles in the population’s gene pool.

Let f (x) = x e8x. find a formula for the nth derivative of f, where n is any positive integer. use x and n in your answer if needed. f (n)(x) =

Which is the completely factored from of xy^3-x^3y