Answer:
30
Step-by-step explanation:
2/3 = x/18
2*18 = 3x
36 = 3x
x=12
so there are 12 boys
12+18=30
Answer: the surface area one: 682m² I didn't screenshot this one
The volume 494. Has attachments below i added them answers.
Step-by-step explanation:
The last one is the answer(y,y-5,and y+7)
C≈100.53cm is the answer I got hope this helps