In the left hand side, you're multiplying 7.8 by 
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be 
Every number remains unchanged when multiplied by 1, so the answer is 3.6
Answer:
Step-by-step explanation:

Let's get all of the terms with the
on the right-hand side of the equation, and everything else on the left-hand side of the equation.
To do this, we should add
to both sides of the equation to remove the
from the left-hand side of the equation:


Finally, to get the
by itself, we can divide both sides by
:


Answer:What is the Radius? Diameter?
Step-by-step explanation:
Answer:
Step-by-step explanation:
Maybe this will help
Number 3 because there is one output(y value) for one input (x value)