3 years ago

I WILL MARK BRAINIEST PLEASE HELP ASAP ITS DUE

Mathematics

2 answers:

ElenaW [278]3 years ago

8 0

Answer:

The star has rotational symmetry of order 5.

Step-by-step explanation:

GenaCL600 [577]3 years ago

8 0

The star has a rote too all

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Give an indirect proof of the following statement

arlik [135]

Complicated answer.............

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4 years ago

There were 605 people sitting in an auditorium at the start of a show. Thirty-five people left during the intermission. How many

sp2606 [1]

Answer:

570

Step-by-step explanation:

In order to get the answer, you simply subtract.. 605-35=570

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4 years ago

Lament has a jar containing 6 red chips, 10 blue chips, and 4 yellow chips. If he removes one chip at random, what is the probab

umka2103 [35]

Answer:

7/10 or 70%

Step-by-step explanation:

6 red chips, 10 blue chips, and 4 yellow chips = 20 chips

P( not red) = not red chips / total

= (blue + yellow) / total

= (10+4)/20

=14/20

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3 years ago

Read 2 more answers

Chris is budgeting for his trip to the mall. He does not want to spend any more than $110. If he wants to buy a pair of pants th

morpeh [17]

Answer:

$19.50 + $14.20x < $110

Step-by-step explanation:

only one pair of jeans and the rest shirts but it can also equal to $110

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3 years ago

50 random teenagers were asked how many hours a day they use their phone. They spent an average of 7 hours a day with a standard

tatyana61 [14]

Answer:

The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.

Step-by-step explanation:

We have the standard deviation of the saple, so we use the t-distribution to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 50 - 1 = 49

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.95}{2} = 0.975$ . So we have T = 2

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2\frac{1.3}{\sqrt{50}} = 0.4$

In which s is the standard deviation of the sample and n is the size of the sample.

The margin of error for the true mean number of hours a teenager spends on their phone is of 0.4 hours a day.

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3 years ago