Answer:
b)
Step-by-step explanation:
The line with positive slope is 3x-5y≥15 and the line with negative slope is 2x+3y≤12.
This is because such inequalities represent half planes which are divided by the corresponding lines.
Put (0,0) in both lines to check if the origin lies in the shaded half plane or not.
<span> (x – 2)(3x + 4) = (x)(3x) + (x)(4) + (-2)(3x) + (-2)(4) (Answer B)</span>
Answer:
i think C
Step-by-step explanation:
1. 7 17/42
2. 42 5/6
3. 7 3/4
4. 12 2/3
5. 2 8/35
Answer:
D
Step-by-step explanation:
to find this with your calculator
![\left[\begin{array}{ccc}5&-5&2\\1&5&-6\\1&4&-5\end{array}\right] ^{-1} \left[\begin{array}{ccc}21\\24\\21\end{array}\right]](https://tex.z-dn.net/?f=%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D5%26-5%262%5C%5C1%265%26-6%5C%5C1%264%26-5%5Cend%7Barray%7D%5Cright%5D%20%5E%7B-1%7D%20%5Cleft%5B%5Cbegin%7Barray%7D%7Bccc%7D21%5C%5C24%5C%5C21%5Cend%7Barray%7D%5Cright%5D)
it will give you [5 -1 -4]
