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3 years ago

Find the sum and express it in simplest form. ( -y + 5a - 4 ) + ( -3y - a - 5 )

2 answers:

6 0

(-y + 5a - 4) + (-3y - a - 5)

= 5a-a-y-3y-4-5 <---- Group like terms

= 4a-y-3y-4-5 <---- Add similar elements

= 4a-4y-4-5 <---- Add similar elements (cont.)

= 4a-4y-9

Mkey [24]3 years ago

3 0

Answer:

4a-4y-9

Step-by-step explanation:

First we need to get rid of the brackets: - y + 5a - 4 -3y - a - 5

Because it a minus sign in the second the bracket and we need to add, all the terms are negative. Then we add like terms: - 4y + 4a - 9

Then we put a positive term in front: 4a - 4y - 9

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Volgvan

Answer:

a) The calculated value t = 5.903 > 2.572 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is a true mean value is less than 10

b) p - value 0.00001

The p - value 0.00001 < 0.01

The result is significant at p<0.01

Step-by-step explanation:

Step(i):-

Given mean of the population = 10

Sample size 'n'= 35

Mean of the sample x⁻ = 14.44

Standard deviation of the sample 's' = 4.45

Level of significance ∝ = 0.01

Step(ii):-

Null Hypothesis H₀ : μ >10

Alternative Hypothesis : H₁ : μ < 10

Test statistic

$t = \frac{x^{-} -mean}{\frac{S}{\sqrt{n} } }$

$t = \frac{14.44-10}{\frac{4.45}{\sqrt{35} } }$

t = 5.903

Degrees of freedom = n-1 = 35-1 = 34

tabulated value t₀.₀₁,₃₄ = 2.572

The calculated value t = 5.903 > 2.572 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is a true mean value is less than 10

p- value :

p - value 0.00001

The p - value 0.00001 < 0.01

The result is significant at p<0.01

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3 years ago

Find the length of AB . E 12 B D AB

aivan3 [116]

Answer:

Step-by-step explanation:

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3 years ago

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il63 [147K]

The answer would be 6x+3y=2

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3 years ago

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4. The estimate and the actual are very close. They are 1/6 of a foot apart.

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4 years ago

Help asap! will award brainly and pls explain!

cluponka [151]

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3 years ago