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4 years ago

12

HELP!! PLEASE PLEASE PLEASE PLEASE HELP ME!?!? ILL GIVE POINTS AND BRAINLY!!!!!!!!!!!!!!!!!!

1 answer:

Arisa [49]4 years ago

7 0

The correlation coefficient (r) is a number that describes how closely the numbers in the data set are related. The correlation coefficient will always be between −1.0 and +1.0. If the correlation is positive, there is a positive relationship. If it is negative, the relationship is negative. If the two are not correlated at all, the correlation coefficient will be 0. Strong and weak correlations are a little more subjective in that there is no exact cutoff between strong and weak, but generally, any r value that is close to either 1 or negative 1 is considered strong. Any value of r that is closer to 0 is considered weak.

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Which of the following represents the point of intersection of the system of equations shown below?

Bas_tet [7]

For this case we must find the solution of the following system of equations:

$3x + 4y = 7\\6x + 8y = 14$

If we multiply the first equation by -2 we have the following equivalent system:

$-6x-8y = -14\\6x + 8y = 14$

If we add the equations we have:

$-6x + 6x-8y + 8y = -14 + 14\\0 = 0$

Thus, the system has infinite solutions.

Answer:

Infinite solutions

7 0

3 years ago

Write the equation of the conic section satisfying the given conditions. focus at the pole, e = 3/4, horizontal directrix 2 unit

hjlf

Answer:

The equation in the polar form is;

$r = \dfrac{6}{4 + 3 \cdot sin(\theta)}$

Step-by-step explanation:

e = 3/4 > 1, we have an hyperbola

The polar equation of a conic is of the form;

For vertical directrix

$r = \dfrac{k \cdot e}{1\pm e \cdot cos (\theta)}$

For horizontal directrix

$r = \dfrac{k \cdot e}{1\pm e \cdot sin(\theta)}$

Where;

k = Distance from the focus to the directrix = 2

We have;

$r = \dfrac{2 \cdot \dfrac{3}{4} }{1 + \dfrac{3}{4} \cdot sin(\theta)}$

$r = \dfrac{\dfrac{3}{2} }{1 + \dfrac{3}{4} \cdot sin(\theta)}$

Which gives the equation in the polar form as follows;

$r = \dfrac{6}{4 + 3 \cdot sin(\theta)}$ .

8 0

3 years ago

Solve, y=8x-2, in order to put on a graph

Daniel [21]

Answer:

$\mathrm{X\:Intercepts}:\:\left(\frac{1}{4},\:0\right),\:\mathrm{Y\:Intercepts}:\:\left(0,\:-2\right)$

Step-by-step explanation:

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2 years ago

What is bigger 80% of 90 or 1/2 of 140

lisabon 2012 [21]

80% of 90 would be bigger because:

80/100*80=72
$\frac{1}{2} /100*140=70$

5 0

3 years ago

A phone company charges $0.06 per minute for local calls and $0.15 per minute for international calls. When your bill comes, it

Tpy6a [65]

Answer:

781.92

Step-by-step explanation:

4 0

3 years ago