Answer
Sol: The correct answer is b. three planes that contain point B are ABD, AEF and DHF.
Both have the same denominator
Remove the denominator
5=n
2t^2+1
Subtract t^2 from 3t^2 you get 2t^2
which is 2t^2+1 answer
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.