If
then we should have
Differentiating with respect to 
gives
So 
is indeed conservative, and
The answer to letter A is 9/25. I'm not sure what letter B is, sorry. :/
so we know the tiffany added 50 and 22 in her account and we know her balance is 306 so to find out how much she earned we have to calculate how much she earned in this case
balance
306-22
306
- 22
_______
284
- 50
2 3 4
so 234 is our answer and we can check our and by seeing if it calculates to
306
234
+ 50
2 8 4
+2 2
306
<span>A. Calculate the value of x.</span>
Answer:
10626 different arrangements
Step-by-step explanation:
As we have a total of 23 students and we want to form groups of 3, where the order of the 3 students matters, we can solve this problem using a permutation of 23 choose 3.
The formula for a permutation of n choose p is:
P(n,p) = n! / (n-p)!
So, using n = 23 and p = 3, we have:
P(23,3) = 23! / (23-3)! = 23! / 20! = 23 * 22 * 21 = 10626
So we have a total of 10626 different arrangements of first, second and third place.
