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Sonja [21]
3 years ago
9

Simplify the following: 8h – 4g + 5g + 2h

Mathematics
1 answer:
Talja [164]3 years ago
5 0

8h - 4g + 5g + 2h \\  \\ (8h + 2h) -(4g - 5g) \\  \\ 10h - ( - g) \\  \\ 10h + g
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A study was conducted to determine whether magnets were effective in treating pain. The values represent measurements of pain us
amm1812

Answer:

Given:

Sham: n= 20,     x=0.44,   s=1.24,

Magnet:n= 20,  x =0.49,   s= 0.95

For Sham:

Sample size, n = 20

Sample mean = 0.44

Standard deviation = 1.24

For Magnet:

Sample size = 20

Sample mean = 0.49

Standard deviation = 0.95

The null and alternative hypotheses:

H0: s1²=s2²

H1: s1² ≠ s2²

a) To find the test statistics, use the formula:

\frac{s1^2}{s2^2}

\frac{1.24^2}{0.95^2} = \frac{1.5376}{0.9025} = 1.7037

Test statistics = 1.7037

b) P-value:

Sham: degrees of freedom = n - 1 = 20 - 1 = 19

Magnet: degrees of freedom = n - 1 = 20 - 1 = 19

The critical values:

[Za/2, df1, df2)], [(1 - Za/2), df1, df2]

f[0.05/2, 19, 19], f[(1 - 0.05/2), 19, 19]

f[0.025, 19, 19], f[0.975, 19, 19]

(2.526, 0.3958)

The rejection region:

Reject H0, if  F < 0.3958 or if F > 2.526

c) Conclusion:

Since the critical values of test statistic is between (0.3958 < 1.7037 < 2.526), we fail to reject null hypothesis H0.

There is insufficient evidence to to support the claim that those given a sham treatment have reductions that vary more than those treated with magnets

3 0
2 years ago
Arelli uses 6.9 pints of white paint and blue paint to paint her bedroom walls. 3/4 of this amount is white paint, and the rest
Reika [66]

Answer:

1.73

Step-by-step explanation:

Arelli use 6.9 pints of white and blue paints for her bedroom

3/4 of this amount is white

3/4

= 0.75×100

= 75

100-75

= 25

Amount of blue paint is

25/100×6.9

= 0.25×6.9

= 1.73

4 0
2 years ago
Please PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASEEEE answer as soon as possible. All answers are appreciated. Thank you in
Aneli [31]

Answer:

45

Step-by-step explanation:

3z² - 6z

3(5)² - 6(5)

3(25) - 30

75 - 30

45

6 0
3 years ago
Read 2 more answers
Find the value of X?
Blababa [14]

Answer:

180 degrees

Step-by-step explanation:

3 0
2 years ago
What is the slope of this line?
Dominik [7]

Answer:

\sqrt{8 }  = 2 \sqrt{2}

Step-by-step explanation:

Phytha.

6 0
3 years ago
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