Use elimination to solve each system of equations. 4x + y = 23
3x - y = 12

Use elimination to solve each system of equations.
4x + y = 23
3x - y = 12

Anyone know these questions? i need ,.

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose

Can someone plz me understand how to do these. plz, show work.in exercises 1-4, rewrite the expression in rational exponent form.[tex]\sqrt[4]{625} \sqrt[3]{512} (\sqrt[5]{4} )³ (\sqrt[4]{15} )^{7}\\ (\sqrt[3]{27} )^{2}[/tex]