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3 years ago

7

WILL GIVE BRAINLIEST

1 answer:

podryga [215]3 years ago

6 0

Answer:

80 pages

Step-by-step explanation:

x = number of pages of articles

x = 110 - (23 + 14/2)

x = 110 - (23 + 7)

x = 110 - 30

x = 80

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Simplify (x-5)-(x-1)

kvasek [131]

Answer:

-4

Step-by-step explanation:

<u>→Distribute the -1 to (x - 1):</u>

(x - 5) - (x - 1)

x - 5 - x + 1

<u>→Add like terms (x and -x, -5 and 1):</u>

-4

3 0

3 years ago

Read 2 more answers

Find the Correlation of the following two variables X: 2, 3, 5, 6 Y: 1, 2, 4, 5

Karolina [17]

Answer:

The correlation of X and Y is 1.006

Step-by-step explanation:

Given

X: 2, 3, 5, 6

Y: 1, 2, 4, 5

n = 4

Required

Determine the correlation of x and y

Start by calculating the mean of x and y

<em>For x</em>

$M_x = \frac{\sum x}{n}$

$M_x = \frac{2 + 3+5+6}{4}$

$M_x = \frac{16}{4}$

$M_x = 4$

<em>For y</em>

$M_y = \frac{\sum y}{n}$

$M_y = \frac{1+2+4+5}{4}$

$M_y = \frac{12}{4}$

$M_y = 3$

Next, we determine the standard deviation of both

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

For x

$S_x = \sqrt{\frac{\sum (x_i - Mx)^2}{n -1}}$

$S_x = \sqrt{\frac{(2-4)^2 + (3-4)^2 + (5-4)^2 + (6-4)^2}{4 - 1}}$

$S_x = \sqrt{\frac{-2^2 + (-1^2) + 1^2 + 2^2}{3}}$

$S_x = \sqrt{\frac{4 + 1 + 1 + 4}{3}}$

$S_x = \sqrt{\frac{10}{3}}$

$S_x = \sqrt{3.33}$

$S_x = 1.82$

For y

$S_y = \sqrt{\frac{\sum (y_i - My)^2}{n - 1}}$

$S_y = \sqrt{\frac{(1-3)^2 + (2-3)^2 + (4-3)^2 + (5-3)^2}{4 - 1}}$

$S_y = \sqrt{\frac{-2^2 + (-1^2) + 1^2 + 2^2}{3}}$

$S_y = \sqrt{\frac{4 + 1 + 1 + 4}{3}}$

$S_y = \sqrt{\frac{10}{3}}$

$S_y = \sqrt{3.33}$

$S_y = 1.82$

Find the N pairs as $(x-M_x)*(y-M_y)$

$(2 - 4)(1 - 3) = (-2)(-2) = 4$

$(3 - 4)(2 - 3) = (-1)(-1) = 1$

$(5 - 4)(4 - 3) = (1)(1) = 1$

$(6-4)(5-3) = (2)(2) = 4$

Add up these results;

$N = 4 + 1 + 1 + 4$

$N = 10$

Next; Evaluate the following

$\frac{N}{S_x * S_y} * \frac{1}{n-1}$

$\frac{10}{1.82* 1.82} * \frac{1}{4-1}$

$\frac{10}{3.3124} * \frac{1}{3}$

$\frac{10}{9.9372}$

$1.006$

<em>Hence, The correlation of X and Y is 1.006</em>

4 0

4 years ago

7 1⁄4 − 3 3⁄4<br><br><br><br><br><br> plessssssssssssssssss explainnnnnn

SpyIntel [72]

Lets take this problem as 25/8 - 15/8. This is both the fractions in improper form. Subtract 25 and 15 and divide the answer by 8 so 10 divided by 8 which is equal to 1 1/4

6 0

3 years ago

Read 2 more answers

1234 please help please

Debora [2.8K]

1 . 163 just subtract

6 0

3 years ago

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WILL GIVE BRAINLIEST!!<br><br> Which equations are correct?<br><br> Select each correct answer.

solong [7]

To multiply these expression, multiply the numeric parts, and sum the exponents of the literal parts (because the variable is the same: we're using the power property $a^b\cdot a^c = a^{b+c}$ ).

So, you have:

$3z^7 \cdot (4z^2) = 3\cdot 4 \cdot z^{7+2} = 12z^9$
$6a^5 \cdot (6a^5) = 6\cdot 6 \cdot z^{5+5} = 36z^{10}$
$6b^4 \cdot (-3b^4) = 6\cdot (-3) \cdot b^{4+4} = -18b^8$
$5x^4 \cdot (4x^2) = 5\cdot 4 \cdot x^{4+2} = 20x^6$

3 0

3 years ago