How do you write the phrase as an algebraic expression: the sum of 8 and y?
Questions like these are so that we can learn how to write maths written in English sentences into maths expressions.
Later on, you will need this skill to write and solve equations.
the word "SUM" in maths means the answer to an "ADD".
It is always used with the word "AND" so you know which two (or more) numbers are being added together.
The SUM of 8 AND y, means add 8 and y together.
We can write the expression, but we cannot simplify further because they are unlike terms.
The SUM of 8 and 5 would be: