It would be -140=x... to get this you would multiply x over 14 by 14... since you did it to one side then you have to do it to the other
Answer:

Step-by-step explanation:
You would substitute "2x" for every "x" in the function in the same way you would substitute any other number.
So if f(x)=Sqrt[7x²-3x], then: f(2x)=Sqrt[7(2x)²-3(2x)]
=Sqrt[7(4x²)-3(2x)]
=Sqrt[28x²-6x]
To work out the circumference of a circle, you should use 2πr or πd (r being radius and d being diameter)
So
Circumference = 13.5 x π = 27/2 π = 42.41 inches
Answer:
6
Step-by-step explanation: