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Tema [17]
2 years ago
5

I want to give brainliest one for every subject.

Mathematics
1 answer:
VikaD [51]2 years ago
6 0

Can you please give me brainiest :D

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(81/16)1/4 +(81/16)0<br>​
Mila [183]

Answer:

should be 0.28125

Step-by-step explanation:

6 0
3 years ago
Is The Ratio 35 To 10 Proportional To The Ratio 7 To 5?Explain
SVEN [57.7K]
35 : 10 = 7*5 : 2*5 = 7 : 2

Thus 35 : 10 = 7 : 2;
but 35:10 ≠ 7:5
5 0
3 years ago
Mel is 3 years older than rahfat and Aurelio is twice as old as Mel. The sum of their ages is 57. How old is Mel
blagie [28]
Mel is 21......................................
7 0
3 years ago
A researcher takes a simple random sample of 83 homes in a city and finds that the mean square footage is 1628 with a standard d
Anna [14]

Answer: (1583.63, 1672.37)

Step-by-step explanation:

Given : Sample size : n= 83

Sample mean : \overline{x}=1628

Sample standard deviation : \sigma=243

The population standard deviation(\sigma) is unknown .

The confidence interval for population mean :

\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}

For 90% confidence , significance level =\alpha=1-0.90=0.10

Using t-distribution table , Critical t-value = t_{(\alpha/2, n-1)}=t_{0.05,82}=1.6636

, where n-1 is the degree of freedom.

Now ,  90% confidence interval for the mean square footage of all the homes in that city will be :-

1628\pm (1.6636)\dfrac{243}{\sqrt{83}}\\\\ 1628\pm (1.6636)(26.672715)\\\\\\\\\approx1628\pm 44.37\\\\=(1628- 44.37,\ 1628+ 44.37)\\\\=(1583.63,\ 1672.37)

Hence, the 90% confidence interval for the mean square footage of all the homes in that city = (1583.63, 1672.37)

7 0
3 years ago
Please help me it’s urgent
Aleks04 [339]

Answer:

Picture 1:( x-2.5)²+(y+5.5)²=225

Picture 2:( x-4)²+(y-1)²=25

Step-by-step explanation:

Use the rule: ( x-p)²+(y-q)² =r

( p,q)is the coordinate of the center of the circle

r is the radius of the circle

5 0
3 years ago
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