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3 years ago

Need help with 96!!!

Mathematics

1 answer:

jok3333 [9.3K]3 years ago

4 0

Answer:

The temperature dropped 66 degrees

Step-by-step explanation:

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What is the slope of the graph of 14x + 7y = –9? A. 1/2 B. -1/2 C. 2 D. -2

Debora [2.8K]

First move the 14x over to get 7y=-14x-9 then divide by 7 and you get y= -2x-9/7. the slope is the value next to the x in y=mx+b form so the slope is -2

7 0

3 years ago

Write each fraction or mixed number as a number as a decimal 2 3/8

weeeeeb [17]

Answer:

$\tt2.375$

Step-by-step explanation:

$\tt = 2 \frac{3}{8}$

$\tt = \frac{8 \times 2 + 3}{8}$

$\tt = \frac{19}{8}$

$\tt = 19 \div 8$

$\tt = 2.375$

3 0

3 years ago

Which set of ordered pairs does not represent a function?

Daniel [21]

Answer:

Step-by-step explanation:

3 0

3 years ago

The average survival time after diagnosis for a certain type of cancer on the standard treatment is two years. A medical researc

wolverine [178]

Answer:

The sample size is too small

Step-by-step explanation:

The answer is the last one: the sample size is too small. Since we only got 3 subjects to test, maybe one of them could live for a long time after the diagnosis of Cacer and that made the average survival time go up by a lot.

In order to obtain results with a significance level higher, you need a sample size of at least 20 subjects.

Now lets see why other options wouldnt be good answers:

For a small amount of subjects, it is unlikely to have errors in caculation
The sample size is given
We are not given information about the treatment and we dont even know if the subjects feel more confident with the new treatment. Also, if a Placebo effect works regularly, it shouldnt limit statistical sifgnificance
An increase in 2 years is huge in comparison with the previous survival time.

4 0

3 years ago

The local library had a sale to get rid of the books that were slightly damaged it’s on paper back books for two dollars and har

kondor19780726 [428]

Answer:

The Local Library sold <u>31</u> hardcover books.

Step-by-step explanation:

Let number of paper back books be 'x'.

Let number of hardcover books be 'y'.

Given:

Total number of books sold = 89

Now Total number of books sold is equal to sum of number of paper back books and number of hardcover books.

framing in equation form we get;

$x+y=89 \ \ \ \ \ equation \ 1$

Now Given:

Cost of each paper back books = $2

Cost of each hardcover books = $5

Total Amount raised by library = $271

Now We know that Total Amount raised by library is equal to Cost of each paper back books multiplied by number of paper back books plus Cost of each hardcover books multiplied number of hardcover books.

framing in equation form we get;

$2x+5y=271 \ \ \ \ equation \ 2$