Answer: a11 = 3, a12 = 7, a21 = 1, a22 = -4
<u>Explanation:</u>
3x + 7y = 20
x - 4y = 9
A = ![\left[\begin{array}{ccc}3&7&20\\1&-4&9\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D3%267%2620%5C%5C1%26-4%269%5Cend%7Barray%7D%5Cright%5D)
<u>column 1 </u> <u>column 2</u>
row 1: (a11) 3 (a12) 7
row 2: (a21) 1 (a22) -4
.28 if 1 was 100,and .28 was 2.8, then we divide 100 by 100 same for 2.8
It would most likely take 3-4 hours, maybe even 5.
Answer:
2, 1, 0
Step-by-step explanation:
they are less than 3 (Please mark brainliest)
It's 1 =)))))))))))))) I think it's easy :3