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sveta [45]
3 years ago
15

Use determinants to find out if the matrix is invertible.

Mathematics
1 answer:
wariber [46]3 years ago
5 0

Answer:

The matrix is not invertible.

Step-by-step explanation:

We are given the following matrix in the question:

A =\left[\begin{array}{ccc}-5&0&1\\-1&3&2\\0&10&6\end{array}\right]

Condition for invertible matrix:

A matrix is invertible if and only if the the determinant is non-zero.

We can find the determinant of the matrix as:

|A| = -5[(3)(6)-(2)(10)]-0[(-1)(6)-(2)(0)] + 1[(-1)(10)-(3)(0)]\\|A| = -5(18-20)+(-10)\\|A| = 10-10\\|A| = 0

Since the determinant of the given matrix is zero, the given matrix is not invertible.

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djverab [1.8K]

Answer: $9.91

Step-by-step explanation: The correct answer is $9.91 for the jeans. This is calculated by divided the total paid ($10.11) by 1.02, which represents the cost of the jeans + the 2% interest. 10.11 / 1.02 = $9.91.

You can then double check you work by calculating the 2% interest rate of the jeans. $9.91 x 2% = $ .20. The total is $9.91 for the jeans plus $ .20 for the tax, for a total of $10.11, which is the amount in the original problem.

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3 years ago
What is halfway between 6 and -10
Anastasy [175]

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5 0
3 years ago
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drek231 [11]

Answer:

Step-by-step explanation:

The opposite of a number is found by taking the opposite sign of the one given.  The opposite of 3 is -3; the opposite of -2 is 2.

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5 0
3 years ago
HELP PLEASE ITS DUE TODAY!!!!!
Fofino [41]

Let's find.

\\ \rm\Rrightarrow (-2x^3+x-5)(x^3-3x+4)

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\\ \rm\Rrightarrow -2x^6+x^4-5x^3+6x^4-3x^2+15x-8x^3+4x-20

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#b

Yes

It's because multiplication law states that ab=ba

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