Suppose x is a normal random variable with mean μ = 80 and standard deviation σ = 9. find b such that p(80 ≤ x ≤ b.= 0.3. hint [see example 3.] (round your answer to one decimal place.)

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

Barney & noblet customers can choose to purchase a membership for $25 per year members receive 10% off all store purchases 1. how much would a member pay per year if he bought $50 worth of items each year? 2. write a slope-intercept equation that expresses how much a member pays per year using x to represent his purchases per year 3. how much would a member have to spend per year to pay off his membership fee?

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week