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Dennis_Churaev [7]
3 years ago
15

What is a expression equivalent to 9-(-12)

Mathematics
1 answer:
swat323 years ago
3 0
Answer:

9 + 12

Step-by-step explanation:

Two negative signs together makes addition!

Hope this helps!

- doomdabomb
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Answer:

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Step-by-step explanation:

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3 years ago
Which costs more per notebook, a 4-pack of notebooks for $3.98 or a 5-pack of notebooks for $4.99? Explain
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Answer:

5 pack notebook

Step-by-step explanation:

5 pack notebook costs more because the 4 pack notebook costs 4 dollars w/ 2 cents off, and 5 pack notebook costs 5 dollars and with 1 cent of, so if ir increase by 1 dollar, than probably the 5 pack costs more. It is not about how many, but how much dollars are for per/ notebook.

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A card is drawn from a standard deck of 52 cards. What is the theoretical probability, as a decimal, of drawing an ace? Round th
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3 years ago
Which of the choices below is not a possible correlation coefficient?
fiasKO [112]

Answer:

The condition for r is the following:

-1 \leq r \leq 1

And for this case if we analyze the options the only impossible value is given by:

1.0528

Because this value is higher than 1 and not satisfy the general limits for r

Step-by-step explanation:

The correlation coefficient is a measure of dispersion and is a value between -1 and 1, and is defined as:

r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}

The condition for r is the following:

-1 \leq r \leq 1

And for this case if we analyze the options the only impossible value is given by:

1.0528

Because this value is higher than 1 and not satisfy the general limits for r

8 0
3 years ago
What is the test that you can do to tell if a graph represents a function?
LenKa [72]
B. the vertical line test
3 0
3 years ago
Read 2 more answers
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