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3 years ago

WILL GIVE BRAINLIEST FOR RIGHT ANSWER 16 POINTS

Mathematics

1 answer:

Likurg_2 [28]3 years ago

5 0

Answer:

Absolute value means 2 equations so work below.

Step-by-step explanation:

x + 2 = 3

x = -1

x - 2 = 3

x = 5

I hope I didn't just confuse myself it's been YEARS since i've had simple questions like this (i can edit if needed)

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30000x^2 + 2x + 1200

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Answer: 2(15000x2)+x+600)

Step-by-step explanation:

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3 years ago

1/7 rounded to 2 decimal places

dmitriy555 [2]

Answer:

0.14

Step-by-step explanation:

1/7 = 0.142

Since 2<5 the answer is 0.14.

5 0

3 years ago

Where do parentheses go on 7+9x3-1=25

Anna35 [415]

They would go around the multiplication so it should look like 7+(9 x 3) -1=25

7 0

3 years ago

5. Simplify<br> (7x2+ 8) - (x2 - 2)

Gennadij [26K]

Answer:

$(7 \times 2 + 8) - ( {x}^{2} - 2) \\ (14 + 8) - ( {x}^{2} - 2) \\ 14 + 8 - {x}^{2} + 2 \\ 22 + {x}^{2} + 2 \\ 24 + {x}^{2}$

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3 0

3 years ago

Calculate the sample standard deviation of data from Question 1<br> 76,45,64,80,92

mash [69]

Answer:

$S.D = 15.98$

Step-by-step explanation:

Given: 76,45,64,80,92

Required: Determine the standard deviation

We start by calculating the mean

$Mean = \frac {\sum x}{n}$

Where x-> 76,45,64,80,92 and n = 5

$Mean = \frac {76+45+64+80+92}{5}$

$Mean = \frac{357}{5}$

$Mean = 71.4$

Subtract Mean (71.4) from each of the given data

$76 - 71.4 = 4.6\\45 - 71.4 = -26.5\\64 - 71.4 = -7.4\\80 - 71.4 = 8.6\\92 - 71.4 = 20.6$

Determine the absolute value of the above result

$|4.6| = 4.6\\|-26.5| = 26.5\\|-7.4| = 7.4\\|8.6| = 8.6\\|20.6| = 20.6$

Square Individual Result

$4.6^2 = 21.16 \\26.5^2 = 702.25\\7.4^2 = 54.76\\8.6^2 = 73.96\\20.6^2 = 424.36$

Calculate the mean of the above result to give the variance

$Mean = \frac {\sum x}{n}$

$Mean = \frac{21.16 + 702.25 + 54.76 + 73.96 + 424.36}{5}\\Mean = \frac{1276.49}{5}\\Mean = 255.298$

Hence, Variance = 255.298

Standard Deviation is calculated by $\sqrt{Var}$

$SD = \sqrt{255.298}$

$S.D = 15.9780474402$

$S.D = 15.98 (Approximated)$

6 0

4 years ago