Ab is congruent to de so the second choice
Answer:
a
Step-by-step explanation:
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Answer:
value of x = 19°
Step-by-step explanation:
we know that vertical opposite angles are equal hence Angle 5 = Angle 7
so,
- 5x+10 = 105°
- 5x = 95°
- x = 19°
hence value of x = 19°
Answer: Matrix B is non- invertible.
Step-by-step explanation:
A matrix is said to be be singular is its determinant is zero,
We know that if a matrix is singular then it is not invertible. (1)
Or if a matrix is invertible then it should be non-singular matrix. (2)
Given : A and B are n x n matrices from which A is invertible.
Then A must be non-singular matrix. ( from 2 )
If AB is singular.
Then either A is singular or B is singular but A is a non-singular matrix.
Then , matrix B should be a singular matrix. ( from 2 )
So Matrix B is non- invertible. ( from 1 )
Answer:
Opposite 12= -12
Absolute value of 12: Just -12.
Step-by-step explanation:
I don't know.
