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ioda
2 years ago
5

A) Simplify X-2 7(x - 2)2

Mathematics
1 answer:
Finger [1]2 years ago
6 0

Answer:

welp-

7(x - 2)2 = 14(x-2) = 14x-28

I hope this helps:)

-♥

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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
3 years ago
Someone please help me I’ll give out brainliest please dont answer if you don’t know
Andru [333]

Answer:

subtract 7 from both sides

2x < 7- 7

subtract 7 from 7 to get 0

2x < 0

product of two numbers is < 0 if one is > 0 and the other is < 0. since 2> 0, must be < 0.

x < 0

5 0
2 years ago
which graph could represent y, the amount owed on a car loan, as regular payments are made each month, x?
lianna [129]

Answer is the second graph

The more payments you pay, the less money you owe.

4 0
3 years ago
Read 2 more answers
a number cube with sides labeled 1-6 is rolled 2 times and the sum of the numbers that end face up is calculated. what is the pr
dybincka [34]
<span>Success patterns: 1/6 ; 2/5 ; 3/4 ; 4/3 ; 5/2 ; 6/1
P(sum = 6) = 6/36 = 1/6</span>
8 0
3 years ago
Pls Find the value of x
tatiyna

x + 104 + 28 = 180  \\ (140 + 28 = 132) \\ x = 132

3 0
3 years ago
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