Matrix addition and subtraction are trivial. State truw false for the following: 1. Matrix multiplication is commutative meaning AB= BA 2. If the product AB exists, then BA will exist as well. 3. The transpose of a matrix is the inverse of the matrix. 4. (AB)^t = A^t B^t ( where t stands for the transpose) 5. What about (A+B)^t.

1. False

2. False

3. False

4. False

5. Verified

Step-by-step explanation: see attachment below

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3