Answer:
the length is 8cm???
Step-by-step explanation:
its kind of obvi (i Think)
Answer:
It’s b
Step-by-step explanation:
They are 6, 8, 10, 12 years old.
all of those added is 36 and two-year intervals translates to 2 years apart per cousin.
Answer:
So, option A is correct.
Step-by-step explanation:
To find the inverse of the matrix, the formula is:
![A^{-1} = 1/|A| * Adj A](https://tex.z-dn.net/?f=A%5E%7B-1%7D%20%3D%201%2F%7CA%7C%20%2A%20Adj%20A)
Inverse of the matrix exists if |A| does not equal to 0
|A| = 7 * 9 -( -2 * -10)
|A| = 63 - 20
|A| = 43
AS |A| ≠ 0
so inverse exist.
now finding Adj A
= ![\left[\begin{array}{cc}9&2\\10&7\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D9%262%5C%5C10%267%5Cend%7Barray%7D%5Cright%5D)
![\left[\begin{array}{cc}9/43&2/43\\10/43&7/43\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcc%7D9%2F43%262%2F43%5C%5C10%2F43%267%2F43%5Cend%7Barray%7D%5Cright%5D)
So, option A is correct.