Answer:
Each interior angle = 135 degrees,
Step-by-step explanation:
The exterior angles of all convex polygons add up to 360 degrees.
So for a regular octagon each exterior angle = 360 / 8
= 45 degrees.
Therefore each interior angle = 180 - 45 = 135 degrees,
Answer:
x=3
Step-by-step explanation:
I guessed and checked which x value would make ABC proportional to DBE. If x=3, than DB=8 which is double BE. If x=3, than AB=14 which is double BC. Since it is proportional, It should be correct. I don't remember the actual way you solve this with a formula but this makes sense to me.
Since there is an expression in the square root, it must be non-negative. So:
![f(x)=\sqrt{12-3x}\\\\ \Longrightarrow 12-3x\geq0\\\\ 3x\leq12\\\\ x\leq\dfrac{12}{3}\\\\ x\leq4](https://tex.z-dn.net/?f=f%28x%29%3D%5Csqrt%7B12-3x%7D%5C%5C%5C%5C%20%5CLongrightarrow%2012-3x%5Cgeq0%5C%5C%5C%5C%203x%5Cleq12%5C%5C%5C%5C%20x%5Cleq%5Cdfrac%7B12%7D%7B3%7D%5C%5C%5C%5C%20x%5Cleq4)
Then, the interval is:
Answer:
A.
Step-by-step explanation:
As x approaches positive infinity, f(x) approaches positive inifinty.