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3 years ago

Matrix question help needed

Mathematics

1 answer:

kramer3 years ago

6 0

The required matrix is:

$\left[\begin{array}{ccc}-25&17&0\\8&-1&3\\\end{array}\right]$

Step-by-step explanation:

We need to apply elementary row operation -2R₂+3R₁ tothe matrix:

$A=\left[\begin{array}{ccc}-3&5&2\\8&-1&3\\\end{array}\right]$

Multiplying Row 2 with -2 and Row1 with 3 and adding,

-9 15 6

-16 2 -6

----------

-25 17 0

After applying this operation, Row 1 will be changed while Row 2 will remain same because we get -2R₂+3R₁ -> R₁

The required matrix is:

$\left[\begin{array}{ccc}-25&17&0\\8&-1&3\\\end{array}\right]$

Keywords: Matrices, elementary row operation

Learn more about matrices at:

#learnwithBrainly

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Answer: We are 95% confident that the mean SPF level of sunscreen used by all Cal Poly students is between 29.0813 and 40.0187.

Step-by-step explanation:

Given : Significance level : $\alpha: 1-0.95=0.05$

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By using z-value table,

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i.e. $34.55\pm(1.96)\dfrac{ 20.12}{\sqrt{52}}$

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Now, the 95% confidence interval for the ppopulation mean = . (29.0813, 40.0187)

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3 years ago

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neonofarm [45]

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3 years ago

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Answer:

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3 years ago

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Answer:

Step-by-step explanation:

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2 years ago

The tee for the sixth hole on a golf course is 305 yards from the tee. On that hole, Marsha hooked her ball to the left, as sket

EleoNora [17]

Answer:

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Step-by-step explanation:

Please refer to the attached figure for labeling of the given diagram.

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3 years ago