Step-by-step explanation:
12+ 3x= -24 -3x
Collect like terms
12 +24= - 3x -3x
36 = - 6x
Divide both sides by -6
Therefore, <em>x</em><em> </em>= -6
Since there are as many of these triangles as the polygon has sides (eight for an octagon), you have to multiply the area of this triangle by the number of sides. You will obtain the total area of the octagon: area of octagon = 8 * base * height / 2 = perimeter * apothem / 2 .
i hope this helped you :)
Answer:
![56.7=56+\frac{7}{10}=\frac{567}{10}](https://tex.z-dn.net/?f=56.7%3D56%2B%5Cfrac%7B7%7D%7B10%7D%3D%5Cfrac%7B567%7D%7B10%7D)
Step-by-step explanation:
Answer:
2,400
Step-by-step explanation:
2,389 rounded to the nearest hundred is 2,400