If the value of "y" varies directly with "ex" and y = -8 when x = 20, find "y" if x = -4.
Enter the number that belongs in the green box.
Reduce to simplest form.
y = 2

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?