Solve the following system of equations graphically. click on the graph until the correct solution of the system appears.

x + y = 2
x = 1

b) the dogs need to shift their focus to human scent.

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.