Answer:
For the Sean one it should be 12y=12 then you would divide 12 by 12 to get y=1
For the one about the hair: No, 40 months isn’t reasonable.
For the one about the graph, I am not sure, sorry!
Explanation:
Hair: For Shellie: 40*3 = 120 cm in 40 months
For Carley: 40*2 = 80cm in 40 months
Next we add the amount of hair they have already to the amount of centimeters would grow.
Shellie: 120+10 = 130cm
Carley: 80+20 = 100cm
So if the girls wanted to cut their hair at the exact length, 40 months isn’t a reasonable solution.
Here is how I think the graph will look, sorry if it is incorrect I am only good at solving not graphs