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2 years ago

Item 18

Mathematics

2 answers:

VARVARA [1.3K]2 years ago

3 0

40 tiles is the answer ! Have a great night love

worty [1.4K]2 years ago

3 0

40 tiles is the answer

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The quantity is a rate in formula d=rt.

Nataliya [291]

Answer:

Step-by-step explanation:

Distance Formula D RT

Use the formula r = d/t. Your rate is 24 miles divided by 2 hours, so: r = 24 miles ÷ 2 hours = 12 miles per hour

5 0

2 years ago

Six different second-year medical students at Bellevue Hospital measured the blood pressure of the same person. The systolic re

Yanka [14]

Answer:

$Range=14$

$\sigma^2 =32.4$

$\sigma = 5 .7$

The standard deviation will remain unchanged.

Step-by-step explanation:

Given

$Data: 136, 129, 141, 139, 138, 127$

Solving (a): The range

This is calculated as:

$Range = Highest - Least$

Where:

$Highest = 141; Least = 127$

So:

$Range=141-127$

$Range=14$

Solving (b): The variance

First, we calculate the mean

$\bar x = \frac{1}{n} \sum x$

$\bar x = \frac{1}{6} (136+ 129+ 141+ 139+ 138+ 127)$

$\bar x = \frac{1}{6} *810$

$\bar x = 135$

The variance is calculated as:

$\sigma^2 =\frac{1}{n-1}\sum(x - \bar x)^2$

So, we have:

$\sigma^2 =\frac{1}{6-1}*[(136 - 135)^2 +(129 - 135)^2 +(141 - 135)^2 +(139 - 135)^2 +(138 - 135)^2 +(127 - 135)^2]$

$\sigma^2 =\frac{1}{5}*[162]$

$\sigma^2 =32.4$

Solving (c): The standard deviation

This is calculated as:

$\sigma = \sqrt {\sigma^2 }$

$\sigma = \sqrt {32.4}$

$\sigma = 5 .7$ --- approximately

Solving (d): With the stated condition, the standard deviation will remain unchanged.

5 0

2 years ago

Hiii please help i’ll give brainliest if you give a correct answer tysm!

sleet_krkn [62]

Answer:

d 380

Step-by-step explanation:

5 0

2 years ago

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Use the zeros of the following quadratic to find the x-value of the vertex.

Ivan

B I got this by graphing it into my graphing calculator. Hope this helps

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3 years ago

16x2 + 81y2 + 32x + 648y + 16 = 0 write instandard form

satela [25.4K]

I can’t answer it doesn’t have enough information

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2 years ago