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3 years ago

Factorise x squared - 12x + 36

Mathematics

1 answer:

slava [35]3 years ago

3 0

Answer:

(x-6)(x-6) or (x-6)^2

Step-by-step explanation:

x^2-12x+36=(x-6)(x-6)

Just find two numbers that when they multiply, you get the third term,

which is 36 in this case. And when they add up, you get the second term,

which is -12 in this case. You can also check the answer by multiplying.

(x-6)(x-6)=x^2-6x-6x+36=x^2-12x+36

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Answer:

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Answer:

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The degrees of freedom are given by:

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And the p value would be:

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Step-by-step explanation:

Information given

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$s=0.5$ represent the sample standard deviation

$n=48$ sample size

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$\alpha=0.01$ represent the significance level

t would represent the statistic

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System of hypothesis

We need to conduct a hypothesis in order to check if the true mean is less than 2cm per week, the system of hypothesis are :

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Alternative hypothesis: $\mu < 2$

Since we don't know the population deviation the statistic is given by:

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Replacing the info given we got:

$t=\frac{1.8-2}{\frac{0.5}{\sqrt{48}}}=-2.771$

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And the p value would be:

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Since the p value is lower than the significance level we have enough evidence to conclude that the true mean for this case for the growth rate is less than 2cm per week

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