George is going to buy exactly 10 ink cartridges. 1 cartridge costs £9.39 per cartridge.
3 cartridges costs £24.30 for a pack of 3 cartridges.
Find the difference in cost between the cheapest way and the most expensive way to buy the 10 ink cartridges.

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Which inequality has a dashed boundary line when graphed ?