The sum means addition
v + 3
The second quartile Q₂ is nothing but the Median.
This means that it median = 4.2
The answer to your question is 2
<h2>
Hello!</h2>
The answer is:
The expression for the number of sweets that Sara and Tim have now, are:

<h2>
Why?</h2>
To write the expressions for the number of sweets that Sara and Tim have now, we need to follow the next steps:
Sara starts with 24 sweets and Tim starts with 24 sweets

Then, Sara gives Tim x Sweets

Then. Sara eats 7 of her Sweets

Then, Tim eats half of his sweets

So, the expression for the number of sweets that Sara and Tim have now, are:

Have a nice day!