I'm so sorry for the late answer!
(a) Rectangular container
There are 3 pairs of congruent sides. Each side's area can be solved by multiplying either 12, 8, or 3. Then because for each side, there is another side that is exactly the same, we can multiply by 2.
(2*12*8) + (2*12*3) + (2*8*3) = 312
(b) Surface Area of a cylinder is

We know that r is 2 and that the whole expression is equal to 312.
Plug 2 back into the equation and set it equal to 312.

The height of the cylinder has to be
around 23 inches.
Hello!
X and Y intercepts are found when graphing an equation. You know the X and Y intercepts by when a point crosses the X axis, and for the Y intercept, when a point crosses the Y axis.
First off we must simplify the equation.
4y + 12 = -2x - 12
Here is the photo of the graph attached.
By looking at the graph we can see the answer is...
X intercept = (-12,0)
Y intercept = (0,-6)
Answer:

Step-by-step explanation:
In this exercise, we have two equations, namely:

And we are asked to solve this problem by graphing. In this way, we can write a system of linear equations in two variables, but first of all, let's rewrite:

Then:

So here we have two lines.
The first one is:

This line passes through the origin and has a slope 
The second one is:

This line has a slope
and cuts the y-axis at 
By using graph tools, we get the graph shown below, then:

Answer:
m - 1
c - 6
Step-by-step explanation:

The equation is in slope-intercept form.
y = mx + c
m - slope
c (or b) - y -intercept
Usually if the slope is one it will not be written.
y = 1x + 6
The slope is one.
6 takes 'c's place, so it is the y-intercept.
Hope this helps.