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2 years ago

What are all the coordinates that are solutions to the equation -2x + 4y = -10

Mathematics

1 answer:

zloy xaker [14]2 years ago

4 0

Answer:

(x , 1/2x - 5/2) where x is a real number.

Step-by-step explanation:

-2x + 4y = -10 ⇔ 4y = 2x - 10 ⇔ y = 1/2x - 5/2

then any couple of the form (x , 1/2x - 5/2) is a solution to the equation

example :

let x = 7 then 1/2x - 5/2 = 1/2(7) - 5/2 = 1

in this case -2x + 4y = -2(7) + 4(1) = -14 + 4 = -10

then (7,1) verify the equation

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Answer with Step-by-step explanation:

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2 years ago

The roots of x2 -( ) +34 are 5 -/+3i

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Step-by-step explanation:

Vieta's formulas :

5 - 3i + 5 + 3i = b ⇒ b =10

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3 years ago

A class survey in a large class for first-year college students asked, “About how many minutes do you study on a typical weeknig

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Answer: (110.22, 125.78)

Step-by-step explanation:

The confidence interval for the population mean is given by :-

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Given : Sample size = 463

$\mu=118\text{ minutes}$

$\sigma=65\text{ minutes}$

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Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

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Now, the 90% confidence interval for the population mean will be :-

$118\ \pm\ 2.576\times\dfrac{65}{\sqrt{463}} \\\\\approx118\pm7.78=(118-7.78\ ,\ 118+7.78)=(110.22,\ 125.78)$

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

What is 5/8-1 7/8.

vlada-n [284]

Answer:

-10/8

Step-by-step explanation:

1 and 7/8 = 15/8

5/8 - 15/8= -10/8

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3 years ago