An average person's heart beats about 103,680 times a day. write and solve an equation to find about how many times the average
2 answers:
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C= ![\left[\begin{array}{ccc}-5&26&\\9&-60\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D-5%2626%26%5C%5C9%26-60%5Cend%7Barray%7D%5Cright%5D%20)
Find the determinant;
9*1- 2*4= 1
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Inverse of the matrix;
1(</span>![\left[\begin{array}{ccc}1&-4\\-2&9\end{array}\right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D1%26-4%5C%5C-2%269%5Cend%7Barray%7D%5Cright%5D%20)
Pre-multiplying the matrix by the inverse on both the left hand side and the right hand side gives the answer above.
Find the determinant;
9*1- 2*4= 1
<span>
Inverse of the matrix;
1(</span>
Pre-multiplying the matrix by the inverse on both the left hand side and the right hand side gives the answer above.