Brainest gets 100 do problem 1-12 show your work

Mathematics

1 answer:

In-s [12.5K]2 years ago

6 0

1. Closed
2. IDK
3. No, because the first inequality says x is lesser than 5 but the second one says x is greater. X can't be both greater and lesser at the same time.
4. X>12
5. X $\leq -4$
6. y<-8
7. 2.3 + w>18
8. -4t $\leq -2/5$
9. b - 4.2 < -7.5
10. 2x $\leq -24$
11. 4 + 8 $\leq 12$ - Correct
12. 5(-5) > -15 = -25 > -15 = Incorrect

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Answer:

$m \times H=\left[\begin{array}{c c c}\boxed{-9} & \boxed{36} & \boxed{-\dfrac{9}{2}}\end{array}\right]$

Step-by-step explanation:

Calculate the value of m

Given:

$3\left[\begin{array}{c c}-1 & 2 \\4 & 8\end{array}\right]=\dfrac{2}{3}m \times \left[\begin{array}{c c}-1 & 2 \\4 & 8\end{array}\right]$

Therefore:

$\implies 3=\dfrac{2}{3}m$

$\implies m=3 \times \dfrac{3}{2}$

$\implies m=\dfrac{9}{2}$

Calculate the value of H

Given:

$\left(H+ \left[\begin{array}{c c c}1 & 4 & -2\end{array}\right]\right)+\left[\begin{array}{c c c}3 & 2 & -6\end{array}\right]=\left[\begin{array}{c c c}-2 & 8 & -1\end{array}\right]+\left(\left[\begin{array}{c c c}1 & 4 & -2\end{array}\right]+\left[\begin{array}{c c c}3 & 2 & -6\end{array}\right]\right)$