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3 years ago

HELP ME PLZZZZZZZ WHICH OF THE FOLLOWING STATEMENT S ABOUT RATIONAL NUMBERS IS NOT CORRECT

Mathematics

1 answer:

Nastasia [14]3 years ago

7 0

D because rational numbers CAN be negative

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In the expression (44 ÷ 4 + 10) - 20 , with which operation should we start?

Luden [163]

You have to do whats in the parentheses from left to right then subtract the answer you get by 20

(9x10) - (30+30)
90 - 60 = 30

8 x (12+5) -7^2
17
17-49
18 x -32

= -576.

You have to use pemdas for your check off
P=parentheses
E=exponet
M=multiplication
D=division
A=add
S=subtrabt

HOPE IM CORRECT

4 0

2 years ago

Read 2 more answers

Austin opened a bank account. He deposited $100 on Monday and $70 on Tuesday.

shutvik [7]

Answer:

22 weeks

Step-by-step explanation:

8 0

2 years ago

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In a survey of 100 people, 60 like farming, 65 like civil service. Draw a venn-diagram and find the number of people who like fa

MAXImum [283]

Answer:

Ur question is wrong..

Step-by-step explanation:

In a survey of 100 people, 60 like farming and 65 like civil service?

<u>60+65=125</u>..?

7 0

1 year ago

On average a herd of elephants travels 10 miles in 12 hours<br>(picture included)

Tema [17]

For the first Q the answer is the first square on the left 10 miles divided by 12 hours = 0,83 miles

And the second Q goes with the last square 12 hours divided by 10 miles = 1.2 h which in minutes is 72 minutes or 1h and 12 minutes.

4 0

3 years ago

Read 2 more answers

Need help pls<br>thank you in advance

ira [324]

Answer:

<u />

$\textsf{Mean}\:\overline{X}=\sf \dfrac{\textsf{sum of all the data values}}{\textsf{total number of data values}}$

$\implies \sf Mean\:(Nilo)=\dfrac{5+6+14+15}{4}=\dfrac{40}{4}=10$

$\implies \sf Mean\:(Lisa)=\dfrac{8+9+11+12}{4}=\dfrac{40}{4}=10$

<h3><u>Standard Deviation</u></h3>

$\displaystyle \textsf{Standard Deviation }s=\sqrt{\dfrac{\sum X^2-\dfrac{(\sum X)^2}{n}}{n-1}}$

$\begin{aligned}\displaystyle \textsf{Standard Deviation (Nilo)} & =\sqrt{\dfrac{(5^2+6^2+14^2+15^2)-\dfrac{(5+6+14+15)^2}{4}}{4-1}}\\\\& = \sqrt{\dfrac{482-\dfrac{40^2}{4}}{3}}\\\\& = \sqrt{\dfrac{82}{3}}\\\\& = 5.23\end{aligned}$

$\begin{aligned}\displaystyle \textsf{Standard Deviation (Lisa)} & =\sqrt{\dfrac{(8^2+9^2+11^2+12^2)-\dfrac{(8+9+11+12)^2}{4}}{4-1}}\\\\& = \sqrt{\dfrac{410-\dfrac{40^2}{4}}{3}}\\\\& = \sqrt{\dfrac{10}{3}}\\\\& = 1.83\end{aligned}$

<h3><u>Summary</u></h3>

Nilo has a mean score of 10 and a standard deviation of 5.23.

Lisa has a mean score of 10 and a standard deviation of 1.83.

The <u>mean</u> scores are the <u>same</u>.

Nilo's standard deviation is higher than Lisa's. Therefore, Nilo's test scores are more <u>spread out</u> that Lisa's, which means Lisa's test scores are more <u>consistent</u>.

5 0

1 year ago