Barrett's mail manufacturing is a company that produces chain mail. their most popular product is saw cut metal links that hobbyists can use to make their own creations . the company recently spent 789 on advertising, which they can hope to make back quickly .the wire used to produces one ounce of links costs 1 ,but the finished links sell for 4 per ounce . eventually the company will make back its investment and break even. what will their expenses and sales both equal ? how many links must be sold?

Solve the problem by using a venn diagram a group of students were surveyed about their taste in music. they were asked how they like three types of music: rock, country western and jazz. the results are summarized below: no one dislikes all three types of music. six like all three types of music. eleven don’t like country western. sixteen like jazz. three like country western and jazz, but not rock. six don’t like rock. eight like rock and country western. seven don’t like jazz. how many students were surveyed?