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2 years ago

How do you find the r?

Mathematics

1 answer:

Anna35 [415]2 years ago

8 0

Use the formula (zy)i = (yi – ȳ) / s y and calculate a standardized value for each yi. Add the products from the last step together. Divide the sum from the previous step by n – 1, where n is the total number of points in our set of paired data. The result of all of this is the correlation coefficient r.

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Question 6: Simplify the expression 48-5+7X3 О А 16 O B 64 O C 150 O D 22

Verdich [7]

Answer: B. 150
48-5=43
43+7=50
50•3=150

7 0

3 years ago

Read 2 more answers

Can you help me plz ?

Alexxx [7]

Given: 30 total days and there were 6 days with rain with a temperature below 70 degrees

To find the percentage, divide the part (6 days) by the whole (30 days) then multiply the quotient by 100.

(6 days / 30 days) x 100 = 20%

20% of the days in June had a temperature below 70 degrees and had rain.

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2 years ago

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Help with quadratic graphs asap!

zlopas [31]

x= -0.25 and 1.25

x = -0.5 and 1.5

x = 0 and 1

x = -0.375 and 1.625

Step-by-step explanation:

Given equation of the curve is

$y = 4x^2 -4x-1$

(i)

First equation $4x^2 -4x-1 =0$

Here y = 0

In x-axis the value of y = 0

The graph cuts the x-axis at(-0.25,0) and (1.25,0)

So, x= -0.25 and 1.25

(ii)

$4x^2 -4x-1 =2$

here y = 2

The line y= 2 cuts the curve at (-0.5,2) and (1.5,2)

So, x = -0.5 and 1.5

Given equation of the curve is

$y= 3x^2-3x -1$

(i)

$3x^2-3x +2 =2$

$\Leftrightarrow 3x^2-3x -1 = -1$

Here y = -1

The line y = -1 cuts the curve at (0,-1) and (1,-1)

So x = 0 and 1

(ii)

$3x^2-3x -1 =x+1$

Here y = x+1

The line y -x =1 cuts the curve at (-0.375,0.5) and (1.625,2).

So x = -0.375 and 1.625

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3 years ago

in Colorado the state sales tax is 2.9%. if you buy a $2100 computer in Colorado, how much state tax will you pay?

Shtirlitz [24]

Answer:

$60.9

Step-by-step explanation:

Tax = 2.9% of Cost to be bought

= 2.9 / 100 × 2100

= $60.9

6 0

2 years ago

1000^m / 100^n can be written in the form of 10^z express z in terms of m and n

Julli [10]

Answer:

z = 3m - 2n

Step-by-step explanation:

$\frac{ {1000}^{m} }{ {100}^{n} } = {10}^{z} \\ \\ \frac{ {10}^{3m} }{ {10}^{2n} } = {10}^{z} \\ \\ {10}^{3m - 2n} = {10}^{z} \\ \\ 3m - 2n = z \\ \\ \huge \red{ \boxed{z = 3m - 2n}}$

5 0

2 years ago