4 x 3 = 12
12 would be the answer
Answer:
yes, your right
Step-by-step explanation:
Answer:
h= 4
Step-by-step explanation:
A= 1/2(b)(h)
10= 1/2(5)(h)
10= 2.5h
/2.5 /2.5
h= 4
Answer:
The augmented matrix of the system is
.
We apply operations rows:
1. We swap row 1 and 2 and obtain the matrix
.
2. Of the above matrix we subtract row 1 from row 2 twice (R2 - 2R1) and we subtract row 1 from row 3, 5 times. (R3-5R1). We obtain the matrix ![\left[\begin{array}{cccc}1&2&1&4\\0&-1&-3&6\\0&-1&-3&-13\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bcccc%7D1%262%261%264%5C%5C0%26-1%26-3%266%5C%5C0%26-1%26-3%26-13%5Cend%7Barray%7D%5Cright%5D)
3. Of the above matrix we subtract row 2 from row1 twice (R3 - R2) and multiply the row 1 by -1 (-R2). Weobtain the matrix
.
Since each pivote is an one then we conclude that the above matrix is the reduced row-echelon form of the matrix of the system.