Answer:
x+9
Step-by-step explanation:
the sum is the answer to an addition question
"a number" is a variable (I chose x, but it can be pretty much anything you'd like :)
so, the sum of a number and 9 would be x+9 because you are adding "a number" and 9
19/30 written as decimal is 0.63333
Divide numerator by denominator of fraction.
Check the picture below.
it's B
It's definitely B
