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Marina CMI [18]
3 years ago
5

How do you expand -10(4-b)

Mathematics
1 answer:
katen-ka-za [31]3 years ago
5 0

Answer:

<h2><u>=10b−40</u></h2><h2><u></u></h2>

Step-by-step explanation:

−10(4−b)

=(−10)(4+−b)

=(−10)(4)+(−10)(−b)

=−40+10b

<u>=10b−40</u>

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Which describes an acute angle?
yawa3891 [41]
A is the corect answer :))
6 0
3 years ago
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
PLEASE HELP ASAP
KATRIN_1 [288]

Answer:

752.884 cubic feet

Step-by-step explanation:

Brainliest?

5 0
3 years ago
Freddie put an empty bucket underneath a leaking pipe. After 3/4 hours, Freddie collected 1/2 cups of water. What is the rate, i
lidiya [134]
0.35 cups/hour

To be able to determine the rate at which the water is leaking from the pipe with the information given, you have to divide the number of cups by the number of hours in which they were collected:
12 cups/34 hours= 0.35 cups/hour
According to this, the answer is that the rate at which the water is leaking from the pipe is 0.35 cups/hour.

Hope this helps!!
5 0
4 years ago
5p+6&gt;41<br><br> SHOW WORK.<br><br> giving brainiest
Aleks [24]

Answer:

P>7

Step-by-step explanation:

1)     Subtract 6 from both sides.

5p>41-6

2)    Simplify  41-6 to 35.

5p>35

3)    Divide both sides by 5.

p>35/5

4)    Simplify 35/5 to 7.

p>7

4 0
3 years ago
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