Answer:
B = 25
Step-by-step explanation:
x/100×8.5=2.1
8.5x/100=2.1
8.5x=100×2.1
8.5x=210
8.5x/8.5=210/8.5
x=24.70
x=25
<u>Given</u>:
Given that the regular decagon has sides that are 8 cm long.
We need to determine the area of the regular decagon.
<u>Area of the regular decagon:</u>
The area of the regular decagon can be determined using the formula,
where s is the length of the side and n is the number of sides.
Substituting s = 8 and n = 10, we get;
Simplifying, we get;
Rounding off to the nearest whole number, we get;
Thus, the area of the regular decagon is 642 cm²
Hence, Option B is the correct answer.
7x-5 combine like terms order off operations hope this helped
21 times (1134)
I actually just divided 1140 and 54 to get 21.11111111(repeating). Then I made sure by doing 54x21 and got 1134