Help plzzzzzzzzzzzz thank u

PLEASE HELP IT IS DUE NOW!!!!<br> will give brainliest

vodomira [7]

Answer:

5.

2.4 = E

-1 4/5 = B

-0.2 =C

-2 3/5 = A

0.6 = D

6. one line under -1

Step-by-step explanation:

5. On the number line each short line is by 2 so basically 2 + 2 + 2

6. -4/3 = 1/1/3 (simplify)

4 0

2 years ago

Read 2 more answers

2. In your own words, explain HOW to find the standard deviation of this data set. (20 points) 3. What does the standard deviati

Ket [755]

Answer:

$\sigma = 11.28$ --- Standard deviation

Step-by-step explanation:

Given

See attachment for graph

Solving (a): Explain how the standard deviation is calculated.

<u>Start by calculating the mean</u>

To do this, we divide the sum of the products of grade and number of students by the total number of students;

i.e.

$\bar x = \frac{\sum fx}{\sum f}$

So, we have:

$\bar x = \frac{50 * 1 + 57 * 2 + 60 * 4 + 65 * 3 +72 *3 + 75 * 12 + 77 * 10 + 81 * 6 + 83 * 6 + 88 * 9 + 90 * 12 + 92 * 12 +95 * 2 + 99 * 4 + 100 * 5}{1 + 2 + 4 + 3 +3 + 12 + 10 + 6 + 6 + 9 + 12 + 12 +2 + 4 + 5}$

$\bar x = \frac{7531}{91}$

$\bar x = 82.76$

Next, calculate the variance using the following formula:

$\sigma^2 = \frac{\sum f(x - \bar x)^2}{\sum f}$

i.e subtract the mean from each dataset; take the squares; add up the squares; then divide the sum by the number of dataset

So, we have:

$\sigma^2 = \frac{1 * (50 - 82.76)^2 +...................+ 5 * (100 - 82.76)^2}{91}$

$\sigma^2 = \frac{11580.6816}{91}$

$\sigma^2 = 127.26$

Lastly, take the square root of the variance to get the standard deviation

$\sigma = \sqrt{\sigma^2}$

$\sigma = \sqrt{127.26}$

$\sigma = 11.28$ --- approximated

<em>Hence, the standard deviation is approximately 11.28</em>

Considering the calculated mean (i.e. 82.76), the standard deviation (i.e. 11.28) is small and this means that the grade of the students are close to the average grade.

8 0

2 years ago

The balance in two separate bank accounts grows each month at different rates. The growth rates for both accounts are represente

Leno4ka [110]

That would be 42(x) greater than 809(x)

8 0

2 years ago

How many solutions are there for the system of nonlinear equations represented by this graph?

sergij07 [2.7K]

The total solution for the system of nonlinear equations represented by this graph is 2 solutions

<h3>Graphs and Functions</h3>

Quadratic function have a leading degree of 2. The graph of a quadratic function is parabolic in nature.

Since the given graph consists of a parabola, hence the total solution for the system of nonlinear equations represented by this graph is 2 solutions

Learn more on graphs here: brainly.com/question/25020119

#SPJ1

6 0

1 year ago

Plzzzzzz help I don’t understand I know what to do I need to use PEMDAS but my answer is still wrong

Effectus [21]

simplify exponent: 20*(9-4)/50

simplify parentheses: 20*5/50

multiply: 100/50

divide: 2

6 0

3 years ago