Answer:
6) AC could equal BD if ABCD were a square OR ABCD could be a rectangle.
7) I can't read all of #7
Step-by-step explanation:
Since she has $6 off for all the pizzas, she can get 10 pizzas with a $6 discount.
She would save $6 since, she has the discount and she would still have something left so she could buy something more if she wished to.
5/2 should be as simplified as it can get. Hope this helps!