has critical points wherever the partial derivatives vanish:
Then
- If
, then 
; critical point at (0, 0) - If
, then 
; critical point at (1, 1) - If
, then 
; critical point at (-1, -1)
has Hessian matrix
with determinant
- At (0, 0), the Hessian determinant is -16, which indicates a saddle point.
- At (1, 1), the determinant is 128, and
, which indicates a local minimum. - At (-1, -1), the determinant is again 128, and
, which indicates another local minimum.
Answer:
multiplication and division
Step-by-step explanation:
The answer is 2k^2 - 7k - 4 because 2k x k is 2k^2 and 2k x (-4) is -8k and 1 x k is k and 1 x (-4) is -4. So then you would get 2k^2 - 8k + k - 4 which simplifies to 2k^2 - 7k - 4 which is your answer.
Out of every 11 students 7 were girls. Set up the following proportion.
11/7 = 77/x Cross multiply
11x = 7*77
x = 7*77/11
x = 49
49 of the student council members were girls.
