100 POINTS IM LITERALLY BEGGING. this is due tomorrow and im already failing so this would help so please if you do it, do it right. and i posted this twice so when you do this one answer the other on my account for 50 more points. PLEASE

answer:

Step-by-step explanation:

1.(27-2)×180=25×180=4500° ,B

2. (n-2)×180=2340

n-2=2340/180=13

n=15

3. 10x-3+5x+2+7x-11+13x-31+8x-19=(5-2)×180

43x-62=540

43 x=540+62=602

x=14

m∠ S=13x-31=13×14-31=182-31=151°

4. 6(11x+21)=(6-2)×180=720

11x+21=720/6=120

11 x=120-21=99

x=9

5.x=360/9=40°

6.7x-2+9x-31+4x+33=360

20x=360

x=18

m∠DCE=180-(7x-2)=180-(7×18-2)=180-(126-2)=180-124=56°

7. (n-2)180/n=168

180(n-2)=168 n

180n-360=168 n

180 n-168 n=360

12 n=360

n=360/12=30 sides B

8. A

9. Rectangles

squares

iscosceles Trapezoids.

it's

10000

step-by-step explanation: divide by 2,