A delivery truck is transporting boxes of two sizes: large and small. The combined weight of a large box and a small box is 80 pounds. The truck is transporting 50 large boxes and 70 small boxes. If the truck is carrying a total of 4400 pounds in boxes, how much does each type of box weigh?

i think the answer would be c

step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya

the answer on ed. is:

c. "the graph of f(x) has exactly two x-intercepts."

hope i could someone! : )