Answer:
± 
Step-by-step explanation:
Given
x² = 20 ( take the square root of both sides )
x = ±
Answer:
C: Melanie is correct.
Step-by-step explanation:
Answer: piece of paper or a door
Step-by-step explanation:
Answer:
12x = cost
Step-by-step explanation:
12$ per ticket, with x tickets
you multiply the cost of a ticket with the number of tickets he will buy