C. CONCAVE
A mirror with a reflecting surface that caves inward is said to be CONCAVE.
Clue: caves inward. )(
Convex has an outline of surface that cave outward. It is like the outside of the circle or sphere. ()
Answer:
Step-by-step explanation:
Yes
maybe bc of how many times you can add the number itself
N3Y+7 can have infinate solutions