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3 years ago

A rectangular price tag has a perimeter of 28 centimeters. Its area is 40 square centimeters.

Mathematics

1 answer:

BlackZzzverrR [31]3 years ago

5 0

Answer:

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Step-by-step explanation:

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Find the value of x. Round to the nearest tenth.

jenyasd209 [6]

Answer: The answer is 8.8

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2 years ago

Hannah has a grid of squares that had 12 rows with 15 squares in each row. She colors 5 rows of 8 squares in the middle of the g

arlik [135]

there's a grid of squares with 12 rows and in each row there are 15 squares

from this grid she colours 8 squares from each row for 5 rows blue.

the rest of the squares she colours red

so first we have to find how many squares are there in the grid in total

so if each row has 15 squares

then 12 rows have - 15 x 12 = 180 squares

blue coloured squares

she colours 8 rows of 5 squares

so if 1 row has - 5 squares

then 8 rows have - 5 x 8 = 40 squares

from 180 squares, she colours 40 squares blue and the rest red colour

therefore the squares she colours red are

red squares = 180 - 40 = 140 squares

she colours 140 squares red

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3 years ago

Read 2 more answers

Determine if each expression is a polynomial. If it is, classify it.

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I believe that the correct answer is binomial

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2 years ago

Line I passes through point (-1,2). Which of the following CANNOT be the equation

mamaluj [8]

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Step-by-step explanation:

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3 years ago

Suppose it is known that 8 out of the 20 teams in the sample had a season winning percentage better than 0.500.

Ganezh [65]

Answer:

The 95% confidence interval for the true proportion of all teams that had a season winning percentage better than 0.500 is (0.1853, 0.6147).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence interval $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

Z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

8 out of the 20 teams in the sample had a season winning percentage better than 0.500. This means that $n = 20, \pi = \frac{8}{20} = 0.4$ .

95% confidence interval

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 - 1.96\sqrt{\frac{0.6*0.4}{20}} = 0.1853$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 + 1.96\sqrt{\frac{0.6*0.4}{20}} = 0.6147$

The 95% confidence interval for the true proportion of all teams that had a season winning percentage better than 0.500 is (0.1853, 0.6147).

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4 years ago