Answer:
Step-by-step explanation:
412
x=5 see if this helps
-121
Upward, x intercept is (2,0) , y intercept is (0,1), axis of symmetry is 2, vertex is (2,0)
See it in the pic.
n+18
A number n just means a variable n, and since we are increasing it (or adding to it), by 18, it is n+18
