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Levart [38]
3 years ago
5

Evaluate (4+4×4-5)×2

Mathematics
1 answer:
Akimi4 [234]3 years ago
5 0

Answer:

30

Step-by-step explanation:

By following PEMDAS

P - parenthesis | E - exponent | M - multiply | D - divide | A - add | S - subtract

You first work out what is in the parenthesis first. The order of operation would first have you multiply 4×4 = 16, next you will add 4 and subtract 5... 4-16+5 = 15. Finally multiply to what's outside the parenthesis (15)×2. And that's how you arrive to 30 as the final answer.

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Write the repeating decimal .11111111 as a fraction
Nataly [62]

Answer:

What is .11111111 as a fraction?

To write .11111111 as a fraction you have to write .11111111 as numerator and put 1 as the denominator. Now you multiply numerator and denominator by 10 as long as you get in numerator the whole number.

.11111111 = .11111111/1 = 1.1111111/10 = 11.111111/100 = 111.11111/1000 = 1111.1111/10000 = 11111.111/100000 = 111111.11/1000000 = 1111111.1/10000000 = 11111111/100000000

And finally we have:

.11111111 as a fraction equals 11111111/100000000

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A random sample of 130 students is chosen from a population of 4,500 students. The mean IQ in the sample is 120, with a standard
barxatty [35]

Answer:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

Step-by-step explanation:

Information given

\bar X= 120 represent the sample mean

\mu population mean (variable of interest)

s=5 represent the sample standard deviation

n=130 represent the sample size  

For this case we can't set a margin of error just with a % since they not specify 1.13% respect to something for this case we can omit this value

Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom are given by:

df=n-1=130-1=129

The Confidence level is 0.99 or 99%, the significance would be \alpha=0.01 and \alpha/2 =0.005, and the critical value would be t_{\alpha/2}=2.614

And replacing we got:

120-2.614\frac{5}{\sqrt{130}}=118.85    

120+2.614\frac{5}{\sqrt{130}}=121.15    

3 0
3 years ago
A builder needed to buy thirty one boards for his latest project. if the boards he needs come in packs of four how many packages
vodka [1.7K]

Answer:

8

Step-by-step explanation:

31 divided by 4 is 7.75. you cant have 7.75 boards so youd have to round up to 8

5 0
3 years ago
URGENT! Geometry, I am completely lost
NeX [460]
You are correct. For any polygon, the sum of the exterior angles is 360 degrees. You have the correct equation which leads to the correct answer. Nice work on that. 
7 0
3 years ago
Alexis bought 2 bags of apples for the fruit salad for her party. Each bag contained 13 apples. If she cuts each apple into 8 pi
Lerok [7]

Answer:

13*8=104

104*2=

<em>208</em>

Step-by-step explanation:

4 0
3 years ago
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