3 years ago

Can someone help me with this question plus

Mathematics

1 answer:

nasty-shy [4]3 years ago

3 0

Answer:

Step-by-step explanation:

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A dealer paid 10000 for a boat at an auction. At the dealership, a salesperson sold the boat for 30% more than the auction price

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Selling price of boat: 1.3($10,000) = $13,000.

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4 years ago

The mean and standard deviation of the number of practices are = 8 practices and sx = 4.47 practices. The mean and standard devi

ddd [48]

Least square regressions are used to find the equation of <em>best fit between two variables</em>.

The equation of the least-squares regression line is: $\mathbf{y = 9.414 - 0.213x}$

The given parameters are:

$\mathbf{\bar x = 8}$

$\mathbf{\sigma_x = 4.47}$

$\mathbf{\bar y = 7.71}$

$\mathbf{\sigma_y = 1.20}$

$\mathbf{r = -0.793}$

The equation of the least-squares regression line is represented as:

$\mathbf{y = a + bx}$

Where:

$\mathbf{b = r \times \frac{\sigma_y}{\sigma_x}}$

$\mathbf{a = \bar y - b\bar x}$

So, we have:

$\mathbf{b = r \times \frac{\sigma_y}{\sigma_x}}$

$\mathbf{b = -0.793 \times \frac{1.20}{4.47}}$

$\mathbf{b = -0.213}$

$\mathbf{a = \bar y - b\bar x}$

$\mathbf{a = 7.71 - (-0.213) \times 8}$

$\mathbf{a = 9.414}$

So, the equation is:

$\mathbf{y = a + bx}$

$\mathbf{y = 9.414 - 0.213x}$

Read more about equations of least squares regression at:

brainly.com/question/2141008

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2 years ago

Find the sum of -2x^ - 3x and x^ + 7x

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Sum of -2x^-3x is -5x and sum of x^+7x is 8x hope this helps answer my question please !!

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Examine the polynomial p(x)=6x^3+17x^2−24x−35.

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Answer: d

Step-by-step explanation:

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