Half of sum of two and a number multiplied by itself three times

Which of the following expressions is equal to 2x^2+8

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.)

Which of the following is the best first step in solving the equation below? 4+2㏒³x=17