(06.07 HC) Which expression is equivalent to 19x − 6x + 2 and why? (1 point) Select one: a. 15x, because 19x − 6x + 2 = 13x + 2 = 15x b. 11x, because 19x − 6x + 2 = 19x − 8x = 11x c. 2 + 13x, because (19x − 6x) + 2 = 13x + 2 = 2 + 13x d. 2 − 13x, because (19x − 6x) + 2 = −13x + 2 = 2 − 13x

Assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.assume that adults have iq scores that are normally distributed with a mean of mu equals 100 and a standard deviation sigma equals 20. find the probability that a randomly selected adult has an iq between 80 and 120.