Answer:
c. 12x; 111 cm
Step-by-step explanation:
The regular dodecagon has 12 sides. Each side has a length of x=9.25 cm, and we know that the perimeter of the figure is the sum of the lengths of all the sides: Therefore, since we have 12 sides, the perimeter will be given by the product between the length of each side, x, and the number of sides, 12:

and if we substitute x = 9.25 cm, we find

R2+15r+36=0 the answer is r=6
0.3 x 103 = 30.9
0.3 x 1025 = 307.5
3 x 10^5 = 300,000
Answer:
VW=18
Step-by-step explanation:
UV+VW=UW
10+4x=6x+1
2x=9
x=9/2
VW=4x
VW=4*9/2
VW=18