The answer you’re looking for is true
Answer:
2x2=4
Step-by-step explanation:
Yes?
I'm not so sure but I do believe so
65 mph means in 1 hour you drive 65 miles.
To find out how many feet you drive in 1 second you need to convert the above in terms of feet and secs
1 hour = 60 minutes and 1 minute has 60 secs
So 1 hour has 60* 60 secs = 3600 secs.
1 mile - 5280 feet
65 miles = 65*5280 feet
So in 3600 secs you are driving 65 * 5280 feet
Answer:
![\left[\left.\begin{matrix}1 & 0 & 0\\ 0 & 6 & 0\\ 0 & 0 & 7\end{matrix}\right|\begin{matrix}7\\ 5\\ 5\end{matrix}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cleft.%5Cbegin%7Bmatrix%7D1%20%26%200%20%26%200%5C%5C%200%20%26%206%20%26%200%5C%5C%200%20%26%200%20%26%207%5Cend%7Bmatrix%7D%5Cright%7C%5Cbegin%7Bmatrix%7D7%5C%5C%205%5C%5C%205%5Cend%7Bmatrix%7D%5Cright%5D)
Step-by-step explanation:
The given augmented matrix is
![\left[\left.\begin{matrix}3 & 0 & 0\\ 0 & 6 & 0\\ 0 & 0 & 7\end{matrix}\right|\begin{matrix}21\\ 5\\ 5\end{matrix}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cleft.%5Cbegin%7Bmatrix%7D3%20%26%200%20%26%200%5C%5C%200%20%26%206%20%26%200%5C%5C%200%20%26%200%20%26%207%5Cend%7Bmatrix%7D%5Cright%7C%5Cbegin%7Bmatrix%7D21%5C%5C%205%5C%5C%205%5Cend%7Bmatrix%7D%5Cright%5D)
Here, we need to perform the row operation 
and replace 
in the above matrix.
So, divide each element of in the given matrix and other elements remain same.
![\left[\left.\begin{matrix}\dfrac{3}{3} & \dfrac{0}{3} & \dfrac{0}{3}\\ 0 & 6 & 0\\ 0 & 0 & 7\end{matrix}\right|\begin{matrix}\dfrac{21}{3}\\ 5\\ 5\end{matrix}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cleft.%5Cbegin%7Bmatrix%7D%5Cdfrac%7B3%7D%7B3%7D%20%26%20%5Cdfrac%7B0%7D%7B3%7D%20%26%20%5Cdfrac%7B0%7D%7B3%7D%5C%5C%200%20%26%206%20%26%200%5C%5C%200%20%26%200%20%26%207%5Cend%7Bmatrix%7D%5Cright%7C%5Cbegin%7Bmatrix%7D%5Cdfrac%7B21%7D%7B3%7D%5C%5C%205%5C%5C%205%5Cend%7Bmatrix%7D%5Cright%5D)
Therefore, the required matrix is .
