Answer:
Option A 
Step-by-step explanation:
we know that
The volume of a cone is equal to

In this problem we have

substitute the values


First, you have to simplify the equation:
y+3 = 3(x+5)
y+3=3x+15
So you multiply what’s inside the brackets (x+5) by the factor (3). So 3•x=3x, 3•5=15.
Then you rearrange the equation as necessary to convert it into standard form, which is Ax + By = C
Answer:
x= 12
Step-by-step explanation: