You spent a total of $6.75 for 15 yards of ribbon. how much did the ribbon cost per year?

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

The ksp expression for the system pbcl2(s) pb+2(aq) + 2 cl-(aq) is: [pbc12][pb+2][2cl-] [pb+2][cl-]2 [pb+2][2cl-]2 [pbcl2][pb+2][cl-]2 [pb+2][2cl-]2[pbcl2]

Atotal of 766 tickets were sold for the school play. they were either adult tickets or student tickets. there were 66 more student tickets sold than adult tickets. how many adult tickets were sold?