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andre [41]
3 years ago
11

Please help asap!!! Need an accurate anwser to hand this assignment in!

Mathematics
1 answer:
fomenos3 years ago
3 0
I would help but my accuracy is under 13% in fortnite
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If x2+y2=40 and xy=5 then find(x+y)2
VMariaS [17]

Answer:

(x + y)^2 = 45

Step-by-step explanation:

(x + y)^{2} = x^{2}  +xy + y^{2}

             = 40 + 5 = 45

8 0
3 years ago
The producer of a certain bottling equipment claims that the variance of all its filled bottles is .027 or less. A sample of 30
Darya [45]

Answer:

The p-value for the test is 0.0459.

Explanation:

The question involves a chi-squared test whose p-value is to be determined.

H₀: σ² ≤ 0.027   (null hypothesis)

H₁: σ² > 0.027    (alternative hypothesis)

Standard deviation = s = 0.2

Hence, s² = (0.2)² = 0.04

Sample size = n = 30

Degree of freedom = n - 1 = 30 - 1 = 29

Significance level = 0.05

Test statistic: X² = (n - 1)s² / σ²

                           = (30 - 1) x 0.04 / 0.027

                           = 42.9629

The p-value can now be determined using the Excel function:

CHISQ.DIST.RT(42.9629,29)  = 0.0459

Hence, the p-value for the test is 0.0459.

3 0
3 years ago
Read 2 more answers
Markers are on sale for $4.50 for Black, $3.25 for Red, and $1.98 for Green. He spends a total of $284.24. If he buys a certain
mixas84 [53]
Let x be number of black markers

4.5x + 2x3.25x + 3x1.98x = 284.24
16.94x = 284.24
x = 16.78 = 17

The person bought 17 black pens, 34 red and 51 green
5 0
3 years ago
What is 20,484,163 in expanded form
LuckyWell [14K]
20,000,000+400,000+80,000+4,000+100+60+3
4 0
3 years ago
The sample mean is a statistic. True or false​
ruslelena [56]

Answer:

true

Step-by-step explanation:

6 0
2 years ago
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