(PLEASE HELP ME) Solve the system of linear equation using substitution method. SHOW YOUR SOLUTION AND THE CHECKING
1.) x+3y =11
2x+y =7
2.) x+y =9
5x+4y =47

What is the slope-intercept form for each equation in this system? compare the slopes and y-intercepts to describe the graph of the system. 3x - 4y = 28 4x + 10y = 20

Heather, sarah, nicky, and jill each have nine markers. how many markers do they have in all?

20 sharpened pencils are placed in a box containing an unknown number of unsharpened pencils suppose 15 pencils are removed at random and five of the remove pencils are sharpened based on this is it reasonable to assume that the number of unsharpened pencil is 40 explain your reasoning