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Monica [59]
3 years ago
11

20. Find the chi square value X 2L corresponding to a sample size of 23 and a confidence level of 90%

Mathematics
1 answer:
frozen [14]3 years ago
8 0

Step-by-step explanation:

At 90% confidence level:

α = 0.10

α/2 = 0.05

At 22 degrees of freedom:

χ²L = 12.338

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You buy $16 worth of food at a restaurant. The sales tax is 5.75% and you wish to tip 10%. What is the bill after tax, how much
Mila [183]
Sales tax on food = total cost of food x sales tax = $16 x 5.75% = $0.92
Bill after tax = total cost of food + sales tax on food = $16 + $0.92 = $16.92
Tip owned = total cost of food x tip in percent = $16 x 0.1 = $1.60

Total bill = bill after tax + tip owed = $16.92 + $1.60 = $18.52
4 0
4 years ago
Calculate the perimeter of this shape.<br> 12 cm<br> 18 cm
Lisa [10]

Answer:

12 +18 + x+y + z +w

In this special case we know that x+y =12 and z+w =18  and for this case we can add all the values 12+18 +12+18=60 and that represent the perimeter  

Step-by-step explanation:

For this case we know that the perimeter is given by:

12 +18 + x+y + z +w

In this special case we know that x+y =12 and z+w =18  and for this case we can add all the values 12+18 +12+18=60 and that represent the perimeter  

6 0
3 years ago
There are 16 ounces in 1 pound. How many ounces are in 5 pounds?
evablogger [386]

Answer:

there are 80 ounces in 5 pounds

Step-by-step explanation:

16x5

3 0
3 years ago
Read 2 more answers
The points(1,r) and (5,-4) lie on a line with slope 5. find the missing coordinate r. ​
Arte-miy333 [17]

The value of r is -24

Step-by-step explanation:

Given points are:

(1,r) and (5,-4)

Let the points be:

(x1,y1) = (1,r)

(x2,y2) = (5,-4)

m = 5

The slope is given by:

m = \frac{y_2-y_1}{x_2-x_1}\\5 = \frac{-4-r}{5-1}\\5 = \frac{-4-r}{4}\\5 * 4 = -4-r\\20 = -4-r\\20+4 = -4-r+4\\24 = -r\\r = -24

Hence,

The value of r is -24

Keywords: Slope, coordinates

Learn more about slope at:

  • brainly.com/question/1106840
  • brainly.com/question/10830549

#LearnwithBrainly

5 0
3 years ago
Write one pair of brackets in this calculation so that the answer is correct. 5 + 2 × 7 – 4 = 11
BartSMP [9]

Answer:

5+2*(7-4) =11

Step-by-step explanation:

This expression was kind of trial and error for me seeing as I'm not really good at logic, but this is pretty basic. There are three possible places the parentheses can be placed (assuming each pair holds 2 terms);

(5+2)*7-4\\5+(2*7)-4\\5+2*(7-4)

The answer to the first expression would be 45, which is not equal to 11.

The answer to the second expression would be 15, which is also not equal to 11.

The answer to the last expression is 11, so that is the correct answer.

Hope this helped :D

- Shay

5 0
3 years ago
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