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3 years ago

13

Which of the following matrices does not have an inverse?

1 answer:

Margarita [4]3 years ago

6 0

I think it is the second one

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What do you already know about linear relationships?

inna [77]

Answer:

A linear relationship (or linear association) is a statistical term used to describe a straight-line relationship between two variables. Linear relationships can be expressed either in a graphical format or as a mathematical equation of the form y = mx + b.

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3 years ago

4x - 9 = 2x + 7.<br>I need correct explanation with please.

Luden [163]

Answer:

8

Step-by-step explanation:

4x - 9 = 2x + 7

4x - 2x = 7 + 9

2x = 16

x = 16 / 2

x = 8

5 0

3 years ago

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I'm posting a lot of these lol but please help me!

Artemon [7]

I dont know the answer but the correct equation would be 3.14×9

3 0

3 years ago

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Sarah is taking a test. The test is designed to produce an overall mean score of 85 with a standard deviation of 5 for all test

Arturiano [62]

Answer:

Option D)

The area below the standardized test score is 0.8413

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 85

Standard Deviation, σ = 5

We are given that the distribution of score is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(score is below 90)

$P( x < 90) = P( z < \displaystyle\frac{90 - 85}{5}) = P(z < 1)$

Calculation the value from standard normal z table, we have,

$P(x < 90) =0.8413 = 84.13\%$

Thus, the correct answer is

Option D)

The area below the standardized test score is 0.8413

4 0

3 years ago

Evaluate the following expression if x=3: 1^x<br> Please help me :(

Kazeer [188]

Answer:

1

Step-by-step explanation:

8 0

3 years ago