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3 years ago

-2 1/3 times 1 1/2 Enter the answer in simplest form

Mathematics

2 answers:

koban [17]3 years ago

8 0

Answer:

-3 1/2

Step-by-step explanation:

- 2 1/3 * 1 1/2

Change each mixed number to an improper fraction

-2 1/3 = -(3*2 +1)/3 = -7/3

1 1/2 = (2*1+1)/2 = 3/2

Multiply the improper fractions

-7/3 * 3/2

-7/2

Change back to a mixed number

2 goes into 7 3 times with 1 left over

-3 1/2

amm18123 years ago

7 0

Answer:

-(7/3) * (3/2) = -21 / 6 = -7 / 2 = -3 (1/2) = -3.5

Step-by-step explanation:

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In my class we're working with inequalities. I understand the overall concept and have worked through most of the problems, but

Nuetrik [128]

Changing the positive/negative happens when you multiply something by -1
-1(x-1) = -x+1
-(x-1) = (-x+1)

3 - (x - 1) = 3 + ( -x + 1) = 4 -x

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4 years ago

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead. Construct a 95% conden

S_A_V [24]

Answer:

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

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 level of $1-\alpha$ , 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 $1 - \frac{\alpha}{2}$ .

In a sample of 42 water specimens taken from a construction site, 26 contained detectable levels of lead.

This means that $n = 42, \pi = \frac{26}{42} = 0.619$

95% confidence level

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:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 - 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.472$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.619 + 1.96\sqrt{\frac{0.619*0.381}{42}} = 0.766$

The 95% confidence interval for the proportion of water specimens that contain detectable levels of lead is (0.472,0.766).

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3 years ago

Lexi subtracts 9,405 from 11,138 should her answer be greater than or less than 2,000

sergey [27]

Less than because if you subtract 11, 138 minus 9,405 you get the answer you get 1,733 and that is less than 2,000

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4 years ago

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Grace [21]

Sent a picture of the solution to the problem (s).

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3 years ago

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Claudia is reading a book that has 360 pages.She read some of the book last week.She plans to read 46 pages today.When she does,

Ne4ueva [31]

Answer:

242 pages.

Step-by-step explanation:

Let x represent number of pages that Claudia read last week.

We have been given that Claudia is reading a book that has 360 pages. She read some of the book last week. She plans to read 46 pages today. When she does,she will be 4/5 of the way through the book.

The number of total page left after reading 46 pages and x pages last week will be equal to 4/5 of 360.

We can represent this information in an equation as:

$x+46=\frac{4}{5}\cdot 360$