Answer:

Step-by-step explanation:
So we have the equation:

Subtract 18 from both sides. The left cancels:

Multiply both sides by -2. The left cancels again:

Take the square root of both sides:

Since we're taking the square root, we need to use plus-minus.
Evaluate:

So, the solutions are -6 or 6.
Round 396.6 to 396, because 396/9=44, making a whole number. Hope this helps!!
Answer:
Can I get more details on this question?
Step-by-step explanation:
If so, I can probably help you a little bit more. And I will edit my response
Answer:
36
Step-by-step explanation:
Area of total region = 12 ×5
=60
Area of the small region = 8×3
=24
Area of shaded region = Area of Total region - area of small region
= 60 - 24
= 36
Answer: 8 vertices
Step-by-step explanation: A cube has 6 square faces. Each segment formed by the intersection of 2 faces is called an edge so a cube has 12 edges. Each point formed by the intersection of 3 edges is called a vertex so a cube has 8 vertices.