How many solutions does this system have? y=-3x -9x-4y=21

The total number of dental clinics total for the last 12 months was recorded

If the tip varies directly with the number of guest which equation represents between the tip,t, and the number of guest,g?

Pentagon abcde is dilated according to the rule do,3(x,y) to create the image pentagon a'b'c'd'e', which is shown on the graph. what are the coordinates of point a of the pre-image? a) (-1, 1)b) (-1, 2)c) (-9, 6)d) (-9, 18)