How many ink cartridges can you buy with 143 dollars if one cartridge costs 11 dollars?

How do i get the answer for 2/3 * 10/3

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36