[tex]\bf Step-by-step ~explanation:[/tex]
We need to simplify this expression.
[tex]\bf Step~1:[/tex]
Add -4 + 9. Since -4 is a negative, we count 9 units from -4.
[tex]\bf -4 + 9 = 5[/tex]
[tex]\bf Step~2:[/tex]
Our expression is 5 + (-10) now. Now, we have to subtract -10 from 5 to get our answer.
[tex]\bf 5 +(-10)=5-10\\5-10=-5[/tex]
[tex]\large\boxed{\bf Our~final~answer:~-5}[/tex]
