Problem 1
sam bought three folders and one
notebook from the office store and
spent $8.25. he went back the next
day and bought two more folders
and three more notebooks and
spent $16. if the prices did not
change between the days, find
the cost of one folder.

Folder = 1.25$

Notebook = 4.5 $

Folder =x

Notebook = y

check the picture below.

step-by-step explanation:

here's what happens:

1) the graph of f   = x^2 is shifted 2 units to the right.

2) the resulting graph is reflected in the x-axis, so that the parabola now opens down.

3) this final result is transformed up by 5 units.