3 years ago

Evaluate the following expression: -2|9|. 18 -11 -18 11

Mathematics

2 answers:

maria [59]3 years ago

7 0

Answer:

- 18

Step-by-step explanation:

note that | 9 | = 9 , thus

- 2 | 9 | = - 2 × 9 = - 18

makkiz [27]3 years ago

6 0

Answer:

-18

Step-by-step explanation:

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Please help me how to do no 5

snow_tiger [21]

Answer:

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Step-by-step explanation:

The determinant of a matrix product is the product of the determinants. The determinant of a transpose is the same as the determinant of the original. Hence ...

$|AB^5C^T|=(4)(-2)^5(\frac{1}{4})=-32$

The multiplication of an n×n matrix by a scalar 'a' multiplies its determinant by a^n, so the desired determinant is ...

$|3AB^5C^T|=3^3(-32) = \boxed{-864}$

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