What is (3.1 x 10^5)(2.2x10^7) in scientific notation? 5.5x10^12 6.82x10^12 5.5x10^35 6.82x10^35

Solve: 3x+y=6 4x-2y=18 show all work !

Aresearch group wants to find the opinions’ of city residents on the construction of a new downtown parking garage. what is the population of the survey downtown shoppers downtown visitors downtown workers city residents

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?