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Karo-lina-s [1.5K]
3 years ago
12

Use a number line to add 5/2 and the additive inverse of 0.4

Mathematics
1 answer:
Leni [432]3 years ago
3 0
5/2=2 1/2 + 2/5 = 2.9 = 2 9/10
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A sample of 56 research cotton samples resulted in a sample average percentage elongation of 8.63 and a sample standard deviatio
ss7ja [257]

To solve for the confidence interval for the true average percentage elongation, we use the z statistic. The formula for confidence interval is given as:

Confidence interval = x ± z σ / sqrt (n)

where,

x = the sample mean = 8.63

σ = sample standard deviation = 0.79

n = number of samples = 56

 

From the standard distribution tables, the value of z at 95% confidence interval is:

z = 1.96

 

Therefore substituting the known values into the equation:

Confidence interval = 8.63 ± (1.96) (0.79) / sqrt (56)

Confidence interval = 8.63 ± 0.207

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5 0
3 years ago
One fourth of the 120 students took wood shop. How many students did not take wood shop?
yawa3891 [41]

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Step-by-step explanation:

Given 1/4 of the 120 students took woodshop, just take the 3/4 that didn't take it:

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5 0
3 years ago
Finding the original price given the sale price and percent...
bulgar [2K]

Answer:

$325

Step-by-step explanation

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x is 100%

cross multiply

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325 = x

4 0
3 years ago
Solve for x. help me please
Marina86 [1]

Answer:

the answer is 20

Step-by-step explanation:

180+180=360

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2 years ago
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Step-by-step explanation:

4 0
3 years ago
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