How many 2/3 cups are there in 6 cups

9 is what I am thinking.

Explanation: So, first you have to know that 2/3 + 1/3 = 3/3 = 1 cup. The answer is 1 and 1/2 cups will make 1 cup when using a 2/3 cup. So, then 1 + 1 + 1 6 times equals 6, then 1/2 + 1/2 6 times equals 3 and 6+3 = 9. There's your answer.

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.