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sergeinik [125]
2 years ago
11

How do the models below and in problem 5 show that -6- (-5) is the same as -6 + 5?

Mathematics
1 answer:
prisoha [69]2 years ago
4 0

Answer:

it shows that a negitive and positive get rid of each other like 1+(-1)=0

so it shows that if you take -5 away from -6 your geting rid of 5 so -1

Hope This Helps!!!

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F(1)=15<br> f(n)=f(n-1)·n<br> f(2)=?
nika2105 [10]

Answer:

is f(2)=13 this is the answer because You have to división ir multiplicar ir

6 0
2 years ago
Please help I'm struggling​
svetlana [45]

Answer:

the first is  1/5 what are the other options

Step-by-step explanation:

4 0
3 years ago
6 x 10^5 over 6 x 10^4 equals ??
Phoenix [80]

Answer:

its 10 just take away the zeros until u have only one of them trust me its right

Step-by-step explanation:

its 10

5 0
3 years ago
Find the mean of the data summarized in the given frequency distribution. Compare the computed mean to the actual mean of 47.3 m
Marta_Voda [28]

Answer:

\bar X = \frac{2276}{48}=47.417

If we compare this value with the 47.3 proposed we have the following error

Error = \frac{|Actual-real|}{real}*100 = \frac{|47.417-47.3|}{47.3}*100 =0.247\%

The computed mean is close to the actual mean because the difference between the means is less than 5%.  

Step-by-step explanation:

Assuming the following dataset:

Speed   42-45  46-49  50-53  54-57  58-61

Freq.         21        15        6           4          2

And we are interested in find the mean, since we have grouped data the formula for the mean is given by:

\bar X = \frac{\sum_{i=1}^n x_i f_i}{\sum_{i=1}^n f_i}

And is useful construct a table like this one:

Speed     Freq    Midpoint   Freq*Midpoint

42-45       21            43.5       913.5

46-49       15            47.5        712.5

50-53       6             51.5         309

54-57        4            55.5         222

58-61        2             59.5        119

Total       48                           2276

And the mean is given by:

\bar X = \frac{2276}{48}=47.417

If we compare this value with the 47.3 proposed we have the following error

Error = \frac{|Actual-real|}{real}*100 = \frac{|47.417-47.3|}{47.3}*100 =0.247\%

The computed mean is close to the actual mean because the difference between the means is less than 5%.  

6 0
3 years ago
Why are (1,2) and(2,1) not equal ordered pair? ​
vladimir1956 [14]

Answer:

The pairs ( 1 , 2 ) and ( 2 , 1 ) are not equal because their respective elements are not equal.

Step-by-step explanation:

The pair of elements which are in specific order is called an ordered pair. The pair ( 1 , 2 ) is not same as the pair ( 2 , 1 ). In the pair ( 1 , 2 ) 1 is in the first position and 2 is in the second position. In the pair ( 2 , 1 ), 2 is in the first position and 1 is in the second position.

Two ordered pairs ( a , b ) and (c , d ) are said to be equal if a = c and b = d. We write ( a , b ) = ( c , d ).

Hope I helped!

Best regards!!

8 0
3 years ago
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