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morpeh [17]
2 years ago
12

Find the sum of -75 and 105​

Mathematics
2 answers:
Varvara68 [4.7K]2 years ago
6 0

Hey there!

Guide #1:

• The word “sum” means “add” or “total” especially in mathematics.

Guide #2:

• Negative & negative = Positive

• Positive & negative = Negative

• Positive & positive = Positive

• Negative & positive = Negative

Guide #3:

• Positives are on the RIGHT side of the number line

• Negatives are on the LEFT side of the number line

Guide #4:

• Negatives are BELOW zero

• Positives are ABOVE zero

Side note:

• Now that we have those guides out of the way we can answer your given question.

Random fact:

• We are ADDING -75 & 105 from each other.

Solving:

• Usually, the result takes the value of the BIGGER answer so this means that your result will be a positive because 105 is positive & it is bigger

• You start from -75 and you go UP 105 spaces to your RIGHT and that will be your answer

° -75 + 105

° = 30

Therefore, your answer is: 30

Good luck on your assignment and enjoy your day!

~Amphitrite1040:)

GuDViN [60]2 years ago
3 0

Answer:

30

Step-by-step explanation:

-75 + 105= 30

(Hope this helps can I pls have brainlist (crown) ☺️)

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Answer:

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Step-by-step explanation:

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The standard deviation of the frequency distribution is 5.54

<h3>How to determine standard deviation?</h3>

The table of values is given as:

x     f(x)

0-3 13

4-7  13

8-11 10

12-15 11

16-19 0

20-23 3

Rewrite the table by calculating the class midpoints:

x     f(x)

1.5 13

5.5  13

9.5 10

13.5 11

17.5 0

21.5 3

Start by calculating the mean using:

\bar x = \frac{\sum fx}{\sum f}

This gives

\bar x = \frac{1.5 * 13 + 5.5 * 13 + 9.5 * 10 + 13.5 * 11 + 17.5 * 0 + 21.5 * 3}{13 + 13 + 10 + 11 + 0 +3}

Evaluate

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The standard deviation is then calculated as:

\sigma = \sqrt{\frac{\sum f(x - \bar x)^2}{\sum f }}

So, we have:

\sigma= \sqrt{\frac{13 * (1.5 - 7.98)^2 + 13  * (5.5 - 7.98)^2 + (9.5 - 7.98)^2 * 10 + (13.5 - 7.98)^2 * 11 + (17.5 - 7.98)^2 * 0 + (21.5 - 7.98)^2 * 3}{13 + 13 + 10 + 11 + 0 +3}}

Evaluate

\sigma= \sqrt{30.6496}

Solve

\sigma= 5.54

Hence, the standard deviation is 5.54

Read more about standard deviation at:

brainly.com/question/15858152

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