2+9:2

The expression "2 + 9 ÷ 2" can be solved by following the order of operations (also known as BEDMAS/BODMAS) which states that you should perform any calculations inside parentheses first, followed by any exponents, then multiplication and division (from left to right), and finally addition and subtraction (from left to right).

In this case, there are no parentheses, exponents, or multiplication. Therefore, we're left with division and addition. We should perform the division first, and then the addition.

9 ÷ 2 = 4.5

Then, 2 + 4.5 = 6.5

So, the answer to the expression "2 + 9 ÷ 2" is 6.5.