Answer:
It's increased by 50% bec the change is 15 ÷ 30 = 0,5 × 100 = 50%
-36
Step-by-step explanation:
3+2+1+2=8-4-3=1-2=-1-1=-2x1x2=-4-1=-5-27=-33-3=-36
20
1/2(a+b)=180
1/2(6+12)=18
1/2(18)=180
9/9=180/9
=20
Answer:A
the right answer is b. 2/3
