Solving Systems of Equations with Inverse Matrices

The video tutorial explains how to solve systems of equations using inverse matrices. It begins by introducing the concept of matrix multiplication and the importance of the order of operations. The tutorial then provides two examples, demonstrating how to find the inverse of a matrix and use it to solve for unknown variables. The process involves calculating the determinant, finding the inverse, and multiplying it by the matrix of constants. The tutorial emphasizes the need to check solutions for accuracy. The video concludes with a summary of the steps involved in solving systems using inverse matrices.

What is the first step in solving a system of equations using inverse matrices?

• Find the determinant of matrix B

• Multiply matrix A by matrix B

• Find the inverse of matrix A

• Add matrix A and matrix B

Tags

CCSS.HSA.REI.C.9

Why is it important to multiply both sides of the equation by the inverse of matrix A on the left?

• To simplify matrix B

• Because matrix multiplication is commutative

• To ensure the identity matrix is formed

• To find the determinant of matrix A

Tags

CCSS.HSA.REI.C.9

What is the determinant of the matrix A in the first example?

• 0

• 1

• -1

• 2

In the first example, what is the value of X after solving the system of equations?

• 3

• 6

• 0

• 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the first example, what is the value of Y after solving the system of equations?

• 6

• 3

• 0

• 2

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What is the determinant of the matrix A in the second example?

• 1

• -7

• 0

• 7

In the second example, what is the value of X after solving the system of equations?

• 3

• 4

• 2

• 1

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

In the second example, what is the value of Y after solving the system of equations?

• 4

• 2

• 1

• 3

Tags

CCSS.8.EE.C.8B

CCSS.HSA.REI.C.6

What should you always do after finding the solution to a system of equations using inverse matrices?

• Find the determinant of matrix B

• Multiply matrix A by matrix B

• Add matrix A and matrix B

• Check the solution

Tags

CCSS.HSA.REI.C.9

What is the final step in solving a system of equations using inverse matrices?

• Add matrix A and matrix B

• Subtract matrix B from matrix A

• Find the determinant of matrix A

• Multiply the inverse of matrix A by matrix B

Tags

CCSS.HSA.REI.C.9