You add half of the coefficient of x and square it.
What you do on one side,you must do it on the other.
An architect is trying to build a cover for two cylinders. He knows the radius of Cylinder 1 is 15 inches and the radius of Cylinder 2 is 16 inches. What is the area of both circles?
Divide the amount of ounces by 16.
Answer with Step-by-step explanation:
Let F be a field .Suppose 
and 
We have to prove that a has unique multiplicative inverse.
Suppose a has two inverses b and c
Then, 
where 1 =Multiplicative identity
(cancel a on both sides)
Hence, a has unique multiplicative inverse.
To find which of the following equations has (2, -1) as a solution, we just need to substitute the x and y values shown in the ordered pair into the equation, and if it simplifies into a true statement, then it will be a solution.
A) y = 2x - 1
-1 = 2(2) - 1
-1 = 4 -1
-1 = 3
Except, -1 ≠ 3, so the answer isn't A.
B) y = x + 3
-1 = 2 + 3
-1 = 5
Except, -1 ≠ 5, so the answer isn't B either.
C) y = x -3
-1 = 2-3
-1 = -1
-1 does equal -1, so the answer is C.
Just to be sure, we should make sure that answer D doesn't work either.
D) y = -2x + 1
-1 = -2(2) + 1
-1 = -4 + 1
-1 = -3
-1 doesn't equal -3, so D isn't the answer.
Therefore, the equation that has (2, -1) as a solution is C) y = x - 3.
