martinmirza444 martinmirza444 10-11-2020 Mathematics contestada 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)