Determine k∈r for which the system x1 3kx3=1kx1−x2−x3−kx4=−1−x1 kx3 (2−k)x4=0−2kx1 (4k−2k2)x3 (1 k)x4=2 has (i) a unique solution, (ii) infinitely many solutions, (iii) no solution.

Arestaurant offers a $12 dinner special that has 5 choices for an appetizer, 12 choices for an entrée, and 4 choices for a dessert. how many different meals are available when you select an appetizer, an entrée, and a dessert? a meal can be chosen in nothing ways. (type a whole number.)

Ineed to know the answer to this algebra question.

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?