Which of the following situations form a proportional relationship?
a.5 dvds for $9 and 15 dvds for $27
b.6 cups of coffee for $8 and 9 cups of coffee for $14
c.3 purses for $60 and 5 purses for $90
d.12 cans for $3 and 30 cans for $7.50
e.2 ink cartridges for $25 and 4 ink cartridges for $75

The numbers on a football field indicate 10 yard increments. you walk around the perimeter of a football field between the pylons. you walk a distance of 30623 yards. find the area and perimeter of the indicated regions. write your answers as mixed numbers, if necessary. a. one end zone: perimeter: yd area: yd2 b. the playing field (not including end zones): perimeter: yd area: yd2 c. the playing field (including end zones): perimeter: yd area: yd2