Completing the squares tells us exactly what square root we will need to calculate our answer.
Using the formula below you can find these answers:

Does this make sense?
Answer:
A) $15
Step-by-step explanation:
let x represent the regular price of the mirror
so, 20% of x = 3
20/100 * x = 3
20x = 300
x = 300/20
x = 15
Hence, the regular price of the mirror is $15
Answer:
390.377
Step-by-step explanation:
pi*r^2
Answer:
D. Balloon Mortgage does not adjust each period
Step-by-step explanation:
A-P-E-X