2 years ago

Please help me with this, it’s due today!

Mathematics

1 answer:

AleksAgata [21]2 years ago

5 0

Answer:

hello i am new to brainly. i am new to this app im just trynna figure this app

Step-by-step explanation:

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Which of the following sets is closed under multiplication? {0, 1, 2, 4} {0, 1} {1, 2}

emmasim [6.3K]

It would be {0,1} :)

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3 years ago

Perform the indicated operation.<br> (5 - 2122

LUCKY_DIMON [66]

Answer:

5 - 2122 = -2,117

Step-by-step explanation:

When you're not sure how to add or subtract, you should probably just use a calculator.

-2,122 + 5 = -2,117

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3 years ago

A rectangular room has a perimeter of 70m and is 20m long write an equation to represent the area

ladessa [460]

70-40= 30
30/2 = 15
40/2= 20
15 x 20 = 300

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3 years ago

On a test that has a normal distribution, a score of 19 falls one standard deviation below the mean, and a score of 40 falls two

nexus9112 [7]

Hi there!

We can use the following equation:

$\large\boxed{z = \frac{x-\mu}{\sigma}}$

z = amount of standard deviations away a value is from the mean (z-score)

σ = standard deviation

x = value

μ = mean

Plug in the knowns for both and rearrange to solve for the mean:

$-1 = \frac{19-\mu}{\sigma}\\\\-\sigma = 19 - \mu\\\\ \sigma = -19 + \mu$

Other given:

$2 = \frac{40-\mu}{\sigma}\\\\2\sigma = 40- \mu\\\\ \sigma = 20 - \frac{\mu}{2}$

Set both equal to each other and solve:

$-19 + \mu = 20 - \frac{\mu}{2}\\\\\frac{3\mu}{2} = 39 \\\\3\mu = 78 \\\\\boxed{\mu = 26 }$

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2 years ago

Hamburger Heaven is having a lunch special where customers buy one 1/4-pound cheeseburger and get one free. If they set aside 48

sweet [91]

Answer:

192

Step-by-step explanation:

Well, well, it takes four 1/4's to equal 1. So, they can make 4 burgers with 1 pound of meat. So, simply multiply 48 times 4 to get your answer.

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1 year ago