155 is your answer lmk if you need anything else
Additive indentity

n = 1
a variable is always a number itself remember 7+n
5+2 = 7
Answer:
Since I'm rushing, please give brainliest
Step-by-step explanation:
It is 23.57, trust me :D
the domain of f(x)=9-x^2 is (-∞,∞), {x|x ∈r}