Area of a parallelogram = base*height
21*9=189cm^2
The whole number of cups 2 will be divided by 3 pies leaving a fraction of

cups for each individual pie.
11) x is greater than or equal to 0.
12) x is less than or equal to 7 or x is greater than or equal to 9
13) 2 is less than or equal to x, x is greater than or equal to 4
14) x is less than 8