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S3W9 Review formative

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Last updated 5 months ago
16 questions
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1
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4
Required
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10
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Question 4
4.
Question 5
5.

match the vocab

Draggable itemarrow_right_altCorresponding Item
Solution Matrix
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Matrix A in the following representation of a system of 3 simultaneous linear equations
Matrix of minors
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Matrix B in the following representation of a system of 3 simultaneous linear equations
Identity matrix
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Inverse Matrix
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A^-1
linear combination
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matrix composed from taking each element of another matrix, crossing out the row and column of that element, taking the determinant of whatever is left in the matrix, and replacing the element with that number.
Coefficient Matrix
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when you take one number and multiply every element of a matrix by that number
Scalar multiplication
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Multiplying different matrices by different coefficients and then adding them together
Matrix multiplication
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matrix formed by multiplying corresponding elements of a row to their matching elements in a column, and then adding those numbers together.
Question 6
6.

Which of the following is the determinant of

Question 7
7.

Which of the following is the inverse of

Question 8
8.

what is an algebraic understanding of the solution to a 3x3 set of simultaneous equations with a coefficient matrix with a determinant of 0?

Question 9
9.

what is an graphical understanding of the solution to a 3x3 set of simultaneous equations with a coefficient matrix with a determinant of 0?

Question 10
10.

Which of the following is not a consequence of a determinant of zero?

Question 11
11.

Explain what the inverse matrix does

Question 12
12.

Inverse matrices must (check all that apply)

Question 13
13.

Can you explain why
why
for matrices A, B and C?

Question 14
14.

Given the following equation, you need to construct A_x to find the solution to x using Cramers rule. you have your matrix calculator handy, what matrix will you fill in for A_x?


us the following Latex code in the answer and press enter. it will give you a null matrix. you can then replace all the zeros with the correct number. \begin{bmatrix}0&0&0\\0&0&0\\0&0&0\end{bmatrix}

Question 15
15.

Solve the following system using any method.

Question 16
16.

Enter the ordered pair to maximize P:
3x+6y≤50
y≥4
4x-3y≥8
2x+8y=P

Question 1
1.

Vocabulary Review: Select the correct word(s) to complete the sentence.

The partial solution of the system of equations at the left uses __?__.

Question 2
2.

The partial solution represents

Question 3
3.

If you found another partial solution eliminating z from a different pair of equations and that partial solution was 2x+10y=3 you would know