All categories

2 years ago

Today only a sofa is being sold at a 24% discount . The sale price is $513. What was the price yesterday?

Mathematics

1 answer:

babymother [125]2 years ago

8 0

I couldn't solve the problem.

You might be interested in

Please help what does A equal

Tema [17]

Answer:

a = 23 degrees (brainliest?)

Explanation:

<em>supplementary line </em>is <u>180 degrees</u>

180 - 157 = 23

7 0

2 years ago

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

10+10 is the same as 11+11<br> do you understand?

Inga [223]

Answer:

wow

Step-by-step explanation:

lol idle b Betsey e wet get hectic

3 0

2 years ago

Read 2 more answers

The angles of two pentagons are all equal to 108°. The length of one side of each pentagon measures 11 cm.

max2010maxim [7]

There is not enough information to determine whether the pentagons are congruent.

3 0

3 years ago

What is the measure of 162<br> A. 324°<br> B. 162°<br> O C. 81°<br> D. 72°

telo118 [61]

Answer:

Step-by-step explanation:

trust me its correct

4 0

2 years ago