HELP PLEASE IMPORTANT 15. 5(4)
16. 3(-1)
17. (-5)(8)
18. -7(4)(8)
19.(-5)(4)(-1)
20.-5(-10)^3
21.-(-5)^2(4)
22. -4(8) - (-5)
23. (4)^2 - 4 (-5)(-1)

Maryann’s friends loved her bulletin board, and 4 of them asked her to make one for their homes. she offered to make each of her friends a replica of her bulletin board that measures 2 meters by 3 meters. how many kilograms of burlap should maryann collect to complete the bulletin boards for her friends? maryann should collect kg of burlap.