Question

FIRST-PERSON BRAINLIEST Which algebraic expression represents “the sum of a number and 9”?

Answer 1

Answer:

Step-by-step explanation:

The sum of a number and 9 is adding of any variable to 9.

E.g the sum of 8 and 7

8+7=15

We can also have the sum of two unknown numbers, we can let the first number be x and the second number be y, then the sum of the two unknown will be (x+y).

So, let apply this to the question

The sum of a number and 9, since we don't the number, let the number be n, then the sum of the number and 9 will be (n+9)

Then the correct option is B which is n+9