at a library book sale, there is one price for hardback books and one price for paperback books. last week, 70 hardbacks and 120 paperbacks were sold for a total of $165. this week, 80 hard backs and 180 paperbacks were sold for $210. write a system of equations that can be solved to find h, the price in dollars of each hardback book and the price in dollars of each paperback book

What is the slope of the line shown below?

What is the volume of this container?

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?