Solve: 2/-1-i

The original problem is 8i/-4-4i

Factor the expression using the gcf. the expression 21m−49n factored using the gcf

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?