24 cookies
dean ate 8 cookies
elise ate 4 cookies
clark ate 6 cookies
Step-by-step explanation:
i am pretty sure this is correct
make a diagram of a circle with twelve spots
change 1/3 to 4/12, so color in 4 spots for dean
multiplie 1/4 times 8/12 ( the remaining spots), color in that number of spots for elise
do the same with 1/2, color in the amount of spots for clark
you will have 3 spots left, meaning each spot is worth 2 cookies
multiplie the number of spots times two to get your answer for each person
Answer:
D
Step-by-step explanation:
If there is a 2x2 matrix as ![\left[\begin{array}{ccc}a&b\\c&d\\\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Da%26b%5C%5Cc%26d%5C%5C%5Cend%7Barray%7D%5Cright%5D)
The determinant is given by ![\frac{1}{ad-bc}\left[\begin{array}{ccc}d&-b\\-c&a\\\end{array}\right]](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bad-bc%7D%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7Dd%26-b%5C%5C-c%26a%5C%5C%5Cend%7Barray%7D%5Cright%5D)
<em>Now, if we calculate the value of "ad - bc", we see that:</em>

We can't calculate the inverse, the inverse doesn't exist. The answer is D.