Question

Peter has 100 dollars. His mom gives him x dollars more. Write an expression to represent the situation.

Answer 1

Answer: x + 100

we know he has 100, and the unknown amount is x. since he has 100 and an undefined amount, you just add them together as you would with 2 defined amounts

Explanation:

Answer 2

100+x

Explanation:

Peter starts out with 100 dollars and then gets X more meaning we have to add X to what he originally had and that looks like this 100+x

I hope this helps and please don't hesitate to ask if there is anything still unclear!