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sergey [27]
3 years ago
12

Help! I'm a little stumped when it comes to variables in matrices. An explanation would be super rad!

Mathematics
1 answer:
iris [78.8K]3 years ago
8 0

Answer:

30

Step-by-step explanation:

To find the determinant of a 3x3 matrix, you can use this method. (See picture.)

Start with the first number in the top row, and block off the row and column.  A 2x2 matrix will be left.  Find the determinant of this 2x2 matrix, and multiply it by the number in the top row.

Repeat for the other two numbers in the top row.  Add the first result, subtract the second, and add the third.

det A = -2 [(3)(-5) − (a)(0)] − 2 [(0)(-5) − (a)(0)] + b [(0)(0) − (3)(0)]

det A = -2 (3)(-5) − 0 + 0

det A = 30

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Quick algebra 1 assignment for 50 points!
Sergeeva-Olga [200]

The example on direct variation is illustrated below based on the information given.

<h3>How to illustrate the direct variation?</h3>

An example will be:

When x = 2, y = 10. Find the value of y when x is 6.

In this case, this will be calculated thus:

y = kx

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Since y = kx.

y = 5 × 6

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The value of y is 30.

Learn more about variation on:

brainly.com/question/25215474

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Step-by-step explanation:

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9514 1404 393

Answer:

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