Answer:
If your money earns a 5 percent interest rate, it will triple in 23 years (115 divided by 5 equals 23).
Step-by-step explanation:
13 and 2, I think that is the only one left.
Answer:
Missing constant: 100
Step-by-step explanation:
perfect square (a - b)^2 = a^2 - 2ab + b^2
In this case
20x = 2 * x * 10
and
10^2 = 100
so
(x - 10)^2 = x^2 - 20x + 100