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2 years ago

Please answer quickly its a test and i need to get a good grade on it, will give brainliest

Mathematics

1 answer:

Helga [31]2 years ago

3 0

I think the answer is A because it I'm right it did double the size.

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A square is constructed with an area of 18 square feet. What is the approximate length of one side?

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2 years ago

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Given cos A = .23 find angle A in radians.

pochemuha

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3 years ago

Find the sample standard deviation:

zlopas [31]

Answer:

Step-by-step explanation:

Given the sample data 2 6 15 9 11 22 1 4 8 19, before we can get the standard deviation, we need to first calculate the mean.

mean = 2 +6 +15 +9 +11 +22 +1 +4 +8 +19/10

mean = 97/10

mean = 9.7

Standard deviation for ungrouped data is expressed using the formula;

$S = \sqrt{ \dfrac{\sum(x-\overline x)^2}{n-1} }$

$\overline x \ is\ the \ mean\\n \ is \ sample \ size$

$S = \sqrt{\frac{(2-9.7)^2+(6-9.7)^2+(15-9.7)^2+(9-9.7)^2+(11-9.7)^2+(22-9.7)^2+(1-9.7)^2+(4-9.7)^2+(8-9.7)^2+(19-9.7)^2}{10-1} }\\ S = \sqrt{\frac{(-7.7)^2+(-3.7)^2+(5.3)^2+(-0.7)^2+(1.3)^2+(12.3)^2+(-8.7)^2+(-5.7)^2+(-1.7)^2+(9.3)^2}{10-1} }\\\\S = \sqrt{\dfrac{59.29+13.69+28.09+0.49+1.69+151.29+75.69+32.49+2.89+86.49}{10-1} }\\\\\\S = \sqrt{\dfrac{452.1}{9} }\\\\S = \sqrt{50.23}\\ \\S = 7.08\\\\S \approx 7.1$

<em>Hence the standard deviation of the sample data is 7.1</em>

7 0

2 years ago

HELP HURRY PLS

Bad White [126]

Answer:

The answer is C, y = 2/3x -2

Step-by-step explanation:

Use the rise over run strategy on linear functions such as this one

5 0

2 years ago

Evaluate the expression for x = 2 and y = 6.<br><br> 2y - 2<br>______ = ___<br> x

Xelga [282]

Substitute 6 for y: We get (2[6]-2)/x, or:

(12-2) / x. Now subst. 2 for x. We obtain 10/2, which equals 5 (answer)

7 0

2 years ago