I assume you're asking about #19? 24 students total, teacher gives each PAIR of students 3 magnets. There are 12 pairs of students, then, and the teacher has given 9 of those pairs their 3 magnets, leaving 3 pairs without their magnets. 3 pairs remaining to get 3 magnets (3*3=9) The teacher needs 9 more magnets.
Step-by-step explanation:first you multiply 0.76 by 14then multiply 0.68 by 8 then multiply 6.71 by 4. After you get your answer for each one you add them by the cost of each one
