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3 years ago

10

the coefficient of correlation between x and y is 0.28 there covariance is 7.6 if the variance of x is 9 then standard division

of y is?

1 answer:

Reptile [31]3 years ago

6 0

Answer: 9.05

the answer is in here: https://brainly.in/question/13877695

Step-by-step explanation:

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Hi please help with this question ???):

maw [93]

The answer to your question is -19

7 0

3 years ago

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Write an equation in point slope form for each line<br> Slope is 3 and (-2,-1) is on the line

elena-14-01-66 [18.8K]

Answer:

$\huge \blue{y + 1 = 3(x + 2) } \\$

Step-by-step explanation:

To find an equation of a line in point slope form when given the slope and a point we use the formula

$y - y_1 = m(x - x_1)$

From the question we have the final answer as

$y + 1 = 3(x + 2)$

Hope this helps you

6 0

3 years ago

Using the quadratic formula to solve x2 + 20 = 2x, what are the values of x?

jeka94

by Quadratic formula , $x^2 + 20 = 2x$ , values of x are $x = 1 \pm (1)i\sqrt{19}}$ . None of mentioned options are correct according to question!

<u>Step-by-step explanation:</u>

Here we have , expression x2 + 20 = 2x or , $x^2 + 20 = 2x$ .

We know that Quadratic formula is :

$x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$

$x^2 + 20 = 2x$

⇒ $x^2-2x+20=0$

$a=1\\b=-2\\c=20$

Putting this value in equation $x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$ :

⇒ $x = \frac{-b \pm \sqrt{b^{2}-4ac}}{2a}$

⇒ $x = \frac{-(-2) \pm \sqrt{(-2)^{2}-4(1)(20)}}{2(1)}$

⇒ $x = \frac{2 \pm \sqrt{4-80}}{2}$

⇒ $x = (\frac{2 \pm 2i\sqrt{19}}{2})$

⇒ $x = 1 \pm (1)i\sqrt{19}}$

Therefore , by Quadratic formula , $x^2 + 20 = 2x$ , values of x are $x = 1 \pm (1)i\sqrt{19}}$ . None of mentioned options are correct according to question!

7 0

3 years ago

Where is -2 1/2 at on a number line

Lubov Fominskaja [6]

Answer:

-2.5

Step-by-step explanation:

-2 1/2 converted to a decimal is -2.5. So, it would be between 3 and 2 in the negatives.

8 0

3 years ago

Cecily picked 219 apples and she divides them equally into 3 baskets how many apples are in each basket

Lynna [10]

There will be 73 apples in each basket,
to solve this you divide 219 into three.
Hope this helped!!

6 0

3 years ago

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