Answer:
x = 2
Step-by-step explanation:
First, let's write out our equation:

I want to isolate x on one side, so first, I'll add 4 to both sides to remove the -4 from next to 2x:

Notice that I combined like terms with the -4 and 4 (to get 0) and the 6 and 4 on the right side (to get 10). Next, I'll add 3x to both sides:

And then I'll add like terms:

Now, all we have to do is divide both sides by 5:

And there's our answer. Hopefully that's helpful! :)
Answer:
Hexahedron
Step-by-step explanation:
A cube is a regular hexahedron, as both the hexahedron and the cube have 6 faces, and a hexhedron can sometimes be a cube.
Answer: n-3, n-2, 180, and 180(n-2)
Step-by-step explanation:
Answer:
The angles are <u>155°</u> and <u>25°</u>.
Step-by-step explanation:
Given:
Two supplementary angles are in the ratio of 31:5.
Now, to find the angles.
The sum of two supplementary angles = 180°
Let the ratio of the angles be
.
So, according to question:


<em>Dividing both sides by 36 we get:</em>

So, 
And, 
Therefore, the angles are 155° and 25°.
Answer: 6
Step-by-step explanation:
15 - 9 = 6 to the quadratics x inequalities formula x b to the power of 