Verified Answer :

MathGeek289

We Need To Remember Order of Operations.

So, We Do:
4+5.
We Know That 4 + 5 = 9, So We Have:
9 ÷ 3 4
Now, We Do:
9 ÷ 3 
This Is 3, So We Have:
3 4. 
We Know That 3 * 4 Is 12, So:

We Know That The Answer To This Expression Is 12.

you do PEMDAS- Parenthesis, exponents, multiplication, division, addition, subtraction,
4+5=9/3=3x4=12

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