It is somewhere in between 7,4 and 4,8
Answer:
x=4
Step-by-step explanation:
If you want the intersect of M and N, then:
M∩N = {4,7} (common part in M AND N)
If one shirt equals to $21.46, and you need to purchase 4 shirts to get the free pair of jeans, you multiply 4 by 21.46 and get 85.84. But if there is 42 customers taking advantage of the special, then you need to multiply 85.84 by 42, and you get 3,605.28.