# Algebra

posted by .

Can you tell me if these are correct? I am not sure that I understand this.

1. Which is the solution for the determinant?
|10 0)|
5 -7

2.Which is the solution for the determinant?
|1 7)|
0 -3

• Algebra -

19.Given matrices A, B, and C are all 2x2, determine whether the equation is true for the given matrices.
C(A+B)= CA + CB

20.Matrix multiplication is not commutative.

21.For matrices, A + B = B + A

## Similar Questions

1. ### economics

Any non-price determinant will have an effect on demand. I really don't know how computer engineers could increase the interest in pc's, but it's not a price determinant and it increases demand. I'm not really sure what the effect …
2. ### Alg II

When you are solving a matix equation and the determinant of your coefficient matrix is zero, how can you determine when it is a no solution versus an infinitely many solution?
3. ### math

I need help with this problem: finding the instantaneous rate of change of y with respect to x at the point x=5 if y=x^2/2+3/5x-1 I know I am suppose to find the determinant first then plug in 5...but I am not sure about the determinant
4. ### algebra

1 A + (B + C)= (A + B) + C associative scalar quantity dot product 2 2 2 3 Two systems of linear equations involving the same variables are said to be _______ if they have the same solution set. set associative equivalent parallel …
5. ### Algebra

I have to compute the determinant of the matrix without using a calculator. If the determinant is zero, write singular matrix. 1 -1 -1 -4 2 0 0 3 1
6. ### Linear Algebra

Suppose C and D and 5x5 matrices and det(C)=5, det(D)=6. Compute the determinant of the matrix 3C^T (4CD)^-1 C^2. Justify your answer by stating explicitly which calculation rules for the determinant you use.
7. ### Algebra 2

1. What is the determinant of the matrix?
8. ### Math

Evaluate the determinant of each matrix -3 2 -3 0 -1 -1 3 0 -3 My answer is -36 The correct answer is -24 but I don't understand how they got the answer.
9. ### Math

What is the determinant of a square matrix whose entry or element is digit or number. For example (100). Please tell me method of finding the determinant of this matrix.
10. ### Algebra 2

What is the solution for the determinant?

More Similar Questions