Jasper needs wood for a rectangular sandbox. The sandbox will be 8 feet by 4.5 feet. He knows the perimeter is found using the expression 2l+2w, or 2(l+w). How many feet of wood should Jasper use?

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.