I believe it's the = equal sign with a little ~ squiggly on top of that.
Answer:
I think it b
Step-by-step explanation:
I had to ADD 4.2+3
Let the value of the number be represented as x.
Then, write out an equation;
3x=2x+3 <--- Solve for x now
3x-2x=3
x=3
Therefore the number is 3.
Hope I helped :)
The formula for the area of a circle is 
So if we have the first one...
≈78.5
Now you can solve the other ones with this formula! Good luck!
Answer:
15
Step-by-step explanation:
5x4=20
5x-1=-5
20-5=15