Answer:

Step-by-step explanation:
-5+2(10b-2)=31
Expand brackets.
-5+20b-4=31
-9+20b=31
Add 9 on both sides.
20b=40
Divide both sides by 20
b=2
Answer:
the answer is 39
Step-by-step explanation:
you have to just easily subtract 72-33= 39
BRAINIEST PLZZZZ AND RATE ME
wait wait wait I feel like I did this before but I don't at the same time-
I have no brain too so yeah sorry- :((
4 g/cm^3
D=MV
D=20g(5 cm^3)