In 2017–2018, the 2,136,539SAT-Math scores were normally distributed with mean 531 and standard deviation 114. reports. collegeboard. org/pdf/2018-total-group-sat-suite- assessments-annual-report. pdfa. How many standard deviations is a scoreof 512 from the mean? WORK:Use this space to take notes as you listen:

Rearrange the formula c^2 = a^2 + b^2 for b

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

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?