a typical home uses a total of seven kilowatts of electricity for each kilowatt of electricity used by the refrigerator. How much of a $70 electric bill is due to using the refrigerator, assuming that every kilowatt costs the same amount?

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

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?

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0