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Iteru [2.4K]
3 years ago
14

This is the question: -10.7 + (- 3.5 )

Mathematics
2 answers:
Inessa [10]3 years ago
8 0

Answer:

the answer is -14.2

Step-by-step explanation:

-10.7 + (-3.5)= -14.2

MA_775_DIABLO [31]3 years ago
3 0

Answer:

-14.2

Step-by-step explanation:

When adding two negatives, simply add together as normal and put a negative sign on the answer.

-10.7 + (-3.5) = -14.2

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Jay's hair grows about 8 inches each year. Write a function that describes the length l in inches that Jay's hair will grow for
xeze [42]

Answer:

l=8k

Step-by-step explanation:

4 0
3 years ago
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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
A local clothing shop is marking down all of its summer clothes by 75%. sarah would like to purchase a swimsuit that is original
trapecia [35]

a)   $80 - ($80 x 0.75)

  = $80 - $60

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b) $20 x 0.10

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c) $20 - $2

= $18

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3 years ago
Given that EF is a diameter of circle D, which of the following arcs must be a major arc?
Rainbow [258]

Answer:

Arc ECG is the major arc

Step-by-step explanation:

Arc ECG is made by an angle which is greater than 180°.

All the other arcs listed are made by angles which are 180° or less than.

The greater the angle measure the greater the arc length.

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the perimeter of a rectangular garden is 360 m. if the width of the garden is 85 m, what is it's length?​
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