Answer:
Hi there!
The correct answer is: 
Step-by-step explanation:
First of all I want to clarify I used to the fourth identity to solve this problem.
The fourth identity is: 
Answer:
Step-by-step explanation:
We can first solve for the face diagonal. That is
. Notice this will form a right triangle with the vertical side. We get that the face diagonal =
. Now, we can use Pythagorean theorem again to get the straw length:
where s = the straw length.
We can solve that s =
X=7
They are the same angle so they are equal
Make an equation:
5x+12=6x
Use the subtraction property:
x=12
The final answer is that the cost for members and nonmembers will be the same when there have been 12 classes.