Answer:
The maximum height of the prism is ![12\ m](https://tex.z-dn.net/?f=12%5C%20m)
Step-by-step explanation:
Let
x------> the height of the prism
we know that
the area of the rectangular base of the prism is equal to
![A=L*W](https://tex.z-dn.net/?f=A%3DL%2AW)
![A\leq 27\ m^{2}](https://tex.z-dn.net/?f=A%5Cleq%2027%5C%20m%5E%7B2%7D)
so
-------> inequality A
------> equation B
-----> equation C
Substitute equation B in equation C
![L=(x-9)+6](https://tex.z-dn.net/?f=L%3D%28x-9%29%2B6)
------> equation D
Substitute equation B and equation D in the inequality A
-------> using a graphing tool to solve the inequality
The solution for x is the interval---------->![[0,12]](https://tex.z-dn.net/?f=%5B0%2C12%5D)
see the attached figure
but remember that
The width of the base must be
meters less than the height of the prism
so
the solution for x is the interval ------> ![(9,12]](https://tex.z-dn.net/?f=%289%2C12%5D)
The maximum height of the prism is ![12\ m](https://tex.z-dn.net/?f=12%5C%20m)
Since we have to solve the given formula for h(height) so, the correct option is (a)
The first equation is 6x - 2y = 10. To solve for y, you will use inverse (opposite) operations to undo what is happening to y. Please see the steps below for the work.
6x - 2y = 10
-6x -6x
<u>-2y </u>= <u>(-6x + 10)</u>
-2 -2
y = 3x - 5