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Xelga [282]
3 years ago
15

Please answer fast!

Mathematics
1 answer:
pentagon [3]3 years ago
5 0

Answer:

4 and 2

Step-by-step explanation:

a positive times a negative makes a negative

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anzhelika [568]

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What is the x and y coordinate of (3,4)

4 0
3 years ago
What is the result when the number 48 is decreased by<br> 15%?
Hitman42 [59]

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40.8

Step-by-step explanation:

48 * .15 = 7.2

48 - 7.2 = 40.8

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8 0
2 years ago
The sodium content of a popular sports drink is listed as 200 mg in a 32-oz bottle. Analysis of 20 bottles indicates a sample me
julia-pushkina [17]

Answer:

The sample does not contradicts the manufacturer's claim.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 200 mg

Sample mean, \bar{x} = 211.5 mg

Sample size, n = 20

Alpha, α = 0.05

Sample standard deviation, s = 18.5 mg

a) First, we design the null and the alternate hypothesis  for a two tailed test

H_{0}: \mu = 200\\H_A: \mu \neq 200

We use Two-tailed t test to perform this hypothesis.

b) Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} } Putting all the values, we have

t_{stat} = \displaystyle\frac{211.5 - 200}{\frac{18.5}{\sqrt{20}} } = 2.7799

c) Now,

t_{critical} \text{ at 0.05 level of significance, 19 degree of freedom } = \pm 2.0930

Since, the calculated t-statistic does not lie in the range of the acceptance region(-2.0930,2.0930), we reject the null hypothesis.

Thus, the sample does not contradicts the manufacturer's claim.

d) P-value = 0.011934

Since the p-value is less than the significance level, we reject the null hypothesis and accept the alternate hypothesis.

Yes, both approach the critical value and the p-value approach gave the same results.

4 0
3 years ago
What is the product? x^2-16/2x+8 times x^3-2x^2+x/x^2+3x-4
tankabanditka [31]

Answer:

v

x

5

−

2

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−

8

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3

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+

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x

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−

4

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2

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40

x

2

+

v

x

+

56

x

+

8

x

−

40

v

x

5

-

2

v

x

4

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8

x

4

+

3

v

x

3

+

24

x

3

-

4

v

x

2

-

40

x

2

+

v

x

+

56

x

+

8

x

-

40

Step-by-step explanation:

8 0
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