A=10 and this is your answer your welcome
A parallelogram without four right angles would prove that to be false.
Answer: 5/12 of the whole pizza
So we start we the whole pizza = 1
Then he ate 3/8:
1 - 3/8
And then 2/3 of what was left:
2/3(1 - 3/8)
2/3 - 1/4
8/12 - 3/12
5/12
20 cats * ( 1 bag of food / 5 cats per month ) = 4 bags of food per month to feed all 20 cats