Answer:
2.21
Step-by-step explanation:
Answer with Step-by-step explanation:
Suppose that a matrix has two inverses B and C
It is given that AB=I and AC=I
We have to prove that Inverse of matrix is unique
It means B=C
We know that
B=BI where I is identity matrix of any order in which number of rows is equal to number of columns of matrix B.
B=B(AC)
B=(BA)C
Using associative property of matrix
A (BC)=(AB)C
B=IC
Using BA=I
We know that C=IC
Therefore, B=C
Hence, Matrix A has unique inverse .
Answer:
3
-3
sqrt(9)
-sqrt(9)
Step-by-step explanation:
What number multiplied by itself will give you 9
3*3 =9
-3*-3 =9
sqrt(9) * sqrt(9) = sqrt(81) = 9
-sqrt(9) * -sqrt(9) = + sqrt(81) =9
The length of the rectangle would be X2 - X1
The height of the rectangle would be Y2-Y1
Perimeter = 2 X length + 2 times height
The perimeter would be 2(X2-X1) + 2(Y2-Y1)
The first choice would be the correct answer.
