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liubo4ka [24]
3 years ago
10

Simplify: -25b^2 + (-4b^2)

Mathematics
2 answers:
adell [148]3 years ago
8 0

Answer:

<em><u>-29b^2       if i can have brainliest that would be great</u></em>

Step-by-step explanation:

-25b^2-4b^2

-25b^2-4b^2=-29b^2

=-29b^2

sveticcg [70]3 years ago
4 0

<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em> </em><em>⤴</em>

<em>H</em><em>o</em><em>p</em><em>e</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em>

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A 3x3 magic square contains each of the numbers 1-9 arranged in such a way that each row, column and diagonal add up to the same
BaLLatris [955]

3×3 magic square (square matrix) of each row, column and diagonal in part (a) add up to 15. part add up to 165 which is 11 times part (a) and part (c)add up to  0 which is 0 times part (a). we deduce this by using trial and error approach.

Part (a) solving it through trial & error method we get the 3×3 magic square (square matrix)

4 9 2

3 5 7

8 1 6

In part (a) the total of each row, column, and diagonal is 15

again taking the same approach of trial and error we get

(b)

54  59.2    52

53  55     57

58  51     56

In part (b) the total of each row, column, and diagonal is 165 which is 11 times more than the total of each row, column, and diagonal in part (a). it is because at the center of part (a) magic square ( square matrix), the number is 5 and at the center of part (b) magic square, the number is 55 which is 11 times that of part (a) magic square( square matrix). we know that the number at the center of a magic square( square matrix) is responsible to make it a magic square ( square matrix) as other numbers are placed according to the number at the center to provide balance.

(c)

-1 4.2 -3

-2 0 2

3 -4 1

In part (c) the total of each row, column, and diagonal is 0. because the digit at the center is zero. In part (c) the total of each row, column, and diagonal is 0 which is 0 times more than the total of each row, column, and diagonal in part (a). it is because at the center of part (a) magic square( square matrix) , the number is 5 and at the center of part (b) magic square( square matrix) , the number is 0 which is 0 times that of the part (a) magic square ( square matrix) when compared. we know that the number at the center of a magic square ( square matrix) is responsible to make it a magic square (square matrix) as other numbers are placed according to the number at the center to provide balance.

learn more about magic square and matrix here

brainly.com/question/16834893

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4 0
2 years ago
Martin tosses 4 pennies, what is the probability that at least 3 coins land on heads?
Oliga [24]
The probability is .25 or 25%
6 0
3 years ago
9+10=
Fiesta28 [93]
The equation sums up to be 19.

6 0
3 years ago
Read 2 more answers
Based on the comparison between the mean annual dividend rates for companies in the insurance and utilities industries, ________
Nina [5.8K]

The annual dividend rate in the utility industry is significantly less than the annual dividend rate in the banking industry.

We have given that,

Based on the comparison between the mean annual dividend rates for companies in the insurance and utilities industries.

Based on the information given, the results show that A.

<h3>What is the annual dividend rate?</h3>

The annual dividend rate in the utility industry is significantly less than the annual dividend rate in the banking industry.

A dividend rate simply means the financial ratio that is important as it shows how much a company pays out in dividends every year relative to the stock price of the company.

In this case,  the 95% confidence interval shows an interval of 1.28 to 6.28 for the difference.

This implies that the annual dividend rate in the utility industry is significantly less than the annual dividend rate in the banking industry.

To learn more about the annual dividend visit:

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3 0
3 years ago
Barack walks 2 kilometers south and then x kilometers east. ​ ​He ends 5 kilometers away from his starting position. ​ ​ Find x
amid [387]

Answer:

4.6 km

Step-by-step explanation:

-This is a Pythagorean Theorem problem where the distances walked are effectively the base and height of the imaginary right triangle thereof.

#Apply Pythagorean theorem to solve:

b^2+h^2=H^2\\\\2^2+x^2=5^2\\\\x^2=5^2-2^2=21\\\\x=\sqrt{21}\\\\x=4.58\  km

\approx 4.6\ km

Hence, the distance x is 4.6 km

7 0
3 years ago
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