Answer:
-3.2
Step-by-step explanation:
Do you have to work this out on paper because I just used a calculator but just add 3.1 + -6.3.
12x-27=2x+12
10x-27=12
10x=39
x=3.9
Answer:

Step-by-step explanation:
we know that
The area of the circle is equal to

where
D is the diameter of the circle
Solve for D
That means-----> Isolate the variable D
Multiply both sides by 4 to remove the fraction

Divide both sides by π

square root both sides

Rewrite

Simplify
