Tions Solve the system of equations using elimination.
Equation 1: 5x - 7y= -21
Equation 2: -5x + 14y=22
Cans somebody please help?

In september, louise planted a tree. every month, the tree louise planted grew 2 inches. what would the constant of proportionality of the line be?

Which graph shows the solution set of x^2+4-12x/> 0

The hockey team has been great! in 2008 they won 20% more games than in 2007. in 2009 they won 50% more games than in 2008. what was their overall percentage increase from 2007 through 2009?