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3 years ago

Picture included-11 points-second time

Mathematics

1 answer:

Lisa [10]3 years ago

4 0

Answer:

b = 12

Step-by-step explanation:

c^2 = a^2 + b^2

Solving for b,

b^2 = c^2 - a^2

= (13)^2 - (5)^2

= 169 - 25

= 144

b = 12

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Step-by-step explanation:

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3 years ago

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Answer:

The calculated |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

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Step-by-step explanation:

Step(i):-

Mean of the Population = 1900

Given random sample size 'n' = 45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

Null Hypothesis:-

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Alternative Hypothesis :-

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Step(ii):-

Test statistic

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|t| = |-26.517|=26.517

Degrees of freedom

γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

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Null hypothesis is rejected at 0.01 level of significance

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X = -1!
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4. Move the terms : x - 6x = 5
5. Collect like terms : -5x = 5
6. Divid both sides by -5
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3 years ago