Answer:
8
Step-by-step explanation:
( 12 + 3m ) / 2 = 18
12 + 3m = 18 x 2
12 + 3m = 36
3m = 36 - 12
3m = 24
m = 24 / 3
m = 8
Answer:
Radius of large cylinder 
Step-by-step explanation:
Volume of the larger tank is three times the volume of smaller tank
Volume of smaller tank

Volume of larger tank

Or it can also be written as

Answer:
B
Step-by-step explanation:
I had the same question
Answer:
x ≤ 18
Step-by-step explanation:
The ≤ symbol means "greater than or equal to". Since it is 'no more' than 18, that means it can be 18 or less. Thus, less than OR equal to. Hope I helped.