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2 years ago

Helpppppppppppppppppppppppppppppppppppppppppppppppppppp.

Mathematics

1 answer:

mina [271]2 years ago

8 0

Answer:

1 and 6 are like terms--true
8 is a factor--true
In 9u, 9 is a coefficient--true

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A path starts and ends at diffrent verticles, and is allowed to repeat vertices and edges.

almond37 [142]

Answer:

Step-by-step explanation:

True

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3 years ago

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You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based on previous study, you beli

zhuklara [117]

Answer:

We need to sample at least 1069 parents.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.05 = 0.95$ , so $z = 1.645$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

How many parents do you have to sample?

We need to sample at least n parents.

n is found when $M = 4, \sigma = 79.5$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$4 = 1.645*\frac{79.5}{\sqrt{n}}$

$4\sqrt{n} = 1.645*79.5$

$\sqrt{n} = \frac{1.645*79.5}{4}$

$(\sqrt{n})^{2} = (\frac{1.645*79.5}{4})^{2}$

$n = 1068.92$

Rounding up

We need to sample at least 1069 parents.

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3 years ago

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Which is an estimate of square root of 15 to one decimal place?

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3.9 is the estimated square root of 15 to one decimal place

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A driver starts his parked car and within 5 seconds reaches a speed of 60 km/h, as he travels east. what

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12 km

Step-by-step explanation:

60/5=12

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3 years ago

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The midpoint of a segment is (−6,−5) and one endpoint is (1,3). Find the coordinates of the other endpoint.

Evgen [1.6K]

C. (-13,-13)
You take the x of the midpoint and equal it to the formula of the midpoint so it will be -6 = 1+x/2 so 1st you times 2 by 6 because you wanna get rid of 2 so it will -12 Then when you move 1 so x is alone it will be -1 so -12-1= -13
Same thing for y

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2 years ago

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