Answer:
-7-(-4)= -3
Step-by-step explanation:
Subtracting a negative number from a negative number – a minus sign followed by a negative sign, turns the two signs into a plus sign. So, instead of subtracting a negative, you are adding a positive.
Answer:
B
Step-by-step explanation:
I am assuming that the university has much more than 100 students so 100 people is just a small sample.
Answer:
it’s false
Step-by-step explanation:
Answer:
True
Step-by-step explanation:
ANSWER
![\left[ { \begin {array} {cc} 10&0& | 10\\-5&-8& | 9\\ \end {array}} \right]](https://tex.z-dn.net/?f=%5Cleft%5B%20%7B%20%5Cbegin%20%7Barray%7D%20%7Bcc%7D%2010%260%26%20%7C%2010%5C%5C-5%26-8%26%20%7C%209%5C%5C%20%5Cend%20%7Barray%7D%7D%20%20%5Cright%5D%20)
EXPLANATION
The given system of equations is
10x=10
-5x-8y=9
We can rewrite this as:
10x+0y=10
-5x-8y=9
The augmented matrix is the combination of the coefficient matrix and the constant matrix.
The coefficient matrix is
![\left[ { \begin {array} {cc} 10&0\\ - 5& - 8\\ \end {array}} \right]](https://tex.z-dn.net/?f=%20%20%5Cleft%5B%20%7B%20%5Cbegin%20%7Barray%7D%20%7Bcc%7D%20%2010%260%5C%5C%20-%205%26%20-%208%5C%5C%20%5Cend%20%7Barray%7D%7D%20%20%5Cright%5D%20%20)
The constant matrix is

The augmented matrix is
![\left[ { \begin {array} {cc} 10&0& | 10\\-5&-8& | 9\\ \end {array}} \right]](https://tex.z-dn.net/?f=%5Cleft%5B%20%7B%20%5Cbegin%20%7Barray%7D%20%7Bcc%7D%2010%260%26%20%7C%2010%5C%5C-5%26-8%26%20%7C%209%5C%5C%20%5Cend%20%7Barray%7D%7D%20%20%5Cright%5D%20%20)