30 since 80+70=150 180-150=30
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 )
Let 'x' represent the monthly membership fee for the gyp.
Since 1 year = 12 month for 1 year Alyson will pay 12x dollars.
But if she pay in advance 12x dollars she will receive $50 discount and pay $514:
12x - 50 = 514
x = $47
The monthly membership fee is $47.
hope it helps
Answer:
No, they do not.
Step-by-step explanation:
Mega Writer pack: 6color:9black ratio or 9 black pens out of 15 total pens.
Mini Writer pack 3color:6black ratio or 6 black pens out of 9.
6:9 is not equal to 3:6 and 9/15 is not equal to 6/9.
Answer:
We say sets A and B are equal, and write A = B if they have exactly the same elements.
Step-by-step explanation:
