Answer:
16.6
Step-by-step explanation:
If you divide you will get that answer
30-x=2(x+6)
30 less a number means 30-x and the sum of the number and 6 is x+6
Answer:
The height of cylinder is 9 cm
Step-by-step explanation:
Volume of cylinder = 198 cm³
Base Area = 22 cm²
We need to find height of the cylinder
The formula used is: 
Where 
First we need to find radius r

So, we get radius r = 2.656
Putting values of volume and radius are to find height

So, the height of cylinder is 9 cm
D. 27
2h+7=61
Subtract 7 from both sides
2h=54
Divide by 2
Answer is 27