Answer:
Step-by-step explanation:
you need to double the radius which is 8 cm
then you do 10 * 8 * 3.14 = 251.2
8/10
10/12
40/42
any of these show work really
Answer:
26.7 (Add unit)
Step-by-step explanation:
Perimeter= 187
Number of sides= 7
Side= Total length of sides/Number of sides
Side= 187/7
Side= 26.7
To find 3x + 42 = 21, you have to subtract 42 from both sides of the equation.
3x + 42 - 42 = 21 - 42
3x = -21
Now, you have to divide 3 from both sides to get your desired answer.
= ![\frac{-21}{3}](https://tex.z-dn.net/?f=%5Cfrac%7B-21%7D%7B3%7D)
x = -7
The final answer is -7.