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11Alexandr11 [23.1K]
3 years ago
15

Solve seven 2/3-1 2/4+3 6/8 choose the numbers to complete complete the next number numbers may be used once or not at all

Mathematics
1 answer:
Bezzdna [24]3 years ago
8 0

Answer:

9 11/12

Step-by-step explanation:

Solve 7 2/3-1 2/4+3 6/8

We are to the above fractions

7 2/3 - 1 2/4 + 3 6/8

The Lowest Common Denominator = 24

(7 - 1 + 3) + ( 2/3 - 2/4 + 6/8)

9 + (16 - 12 + 18/24)

9 + 22/24

9 11/12

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A large school district in southern California asked all of its eighth-graders to measure the length of their right foot at the
Ber [7]

Answer:

The probability of the sample mean foot length less than 23 cm is 0.120

Step-by-step explanation:

* Lets explain the information in the problem

- The eighth-graders asked to measure the length of their right foot at

  the beginning of the school year, as part of a science project

- The foot length is approximately Normally distributed, with a mean of

 23.4 cm

∴ μ = 23.4 cm

- The standard deviation of 1.7

∴ σ = 1.7 cm

- 25 eighth-graders from this population are randomly selected

∴ n  = 25

- To find the probability of the sample mean foot length less than 23

∴ The sample mean x = 23, find the standard deviation σx

- The rule to find σx is σx = σ/√n

∵ σ = 1.7 and n = 25

∴ σx = 1.7/√25 = 1.7/5 = 0.34

- Now lets find the z-score using the rule z-score = (x - μ)/σx

∵ x = 23 , μ = 23.4 , σx = 0.34

∴ z-score = (23 - 23.4)/0.34 = -1.17647 ≅ -1.18

- Use the table of the normal distribution to find P(x < 23)

- We will search in the raw of -1.1 and look to the column of 0.08

∴ P(X < 23) = 0.119 ≅ 0.120

* The probability of the sample mean foot length less than 23 cm is 0.120

4 0
3 years ago
An office will randomly select one computer to check for viruses and other problems. Five of the office computers are less than
alisha [4.7K]
Your answer is going to be 4/9 :)

3 0
3 years ago
Read 2 more answers
X squared plus 8X +12
Xelga [282]

Answer:

(x+2)(x+6)

Step-by-step explanation:

x2 + 8x +12

x              2

x              6

5 0
2 years ago
Stan's Sweater Superstore has a 30% off sale. This week only, everything in the store is marked down an additional 10% off the s
evablogger [386]

Answer:

$30

Step-by-step explanation:

30 % + 10 % = 40 %

40 % of $50 = $20

%50 - $20 = $30

8 0
3 years ago
If f(x) = 2(x)^2 + 5 square root (x+2), complete the following statement (round your answer to the nearest hundredth): f(2) =
mojhsa [17]

f(x) = 2(x)^{2} +5 \sqrt{x+2}

f(2) = 2(2)^{2} + 5 \sqrt{(2)+2}

f(2) = 2(4) + 5\sqrt{4}

f(2) = 8 + 5(2)

f(2)= 8+10

f(2) = 18

3 0
3 years ago
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