What substitution should be used to rewrite x8 – 3x4 + 2 = 0 as a quadratic equation?
a.)u=x^2
b.)u=x^4
c.)u=x^8
d.)ux^16

What are potential hypotheses (explanations) regarding why there are ecological equivalents between many metatherians and eutherians? discuss your hypothesis in terms of the processes that could lead to the current ecologies and distributions of metatherians and eutherians.

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')