Answer:
A. add 81;
Step-by-step explanation:
The perfect square formula
Rewrite expression as follows:
So, to form a perfect square, is missed.
When we add we will get
Twenty decreased by a number. The question says that "a number" =X.
twenty = 20
decreased = minus
by a number = X
Put this all in a line and you get...
an answer of:
20 - X.
4) 2
(4-0) / (1-(-1)) = 4/2 = 2
(10-4) / (4-1) = 6/3 = 2
n>-6 and n<3 (there's your answer my friend)