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Andrew [12]
3 years ago
10

Suppose A and B are two matrices with the same dimensions. Explain how to find A + B and B - B.

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
6 0
A+B: the matrix with same dimension a A and B, the element in row i and column j is:  Aij+Bij

Same for A-B, but with Aij-Bij
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artcher [175]

there are 18 dogs and 3 cats.

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What's 17 times 1764
Gnoma [55]
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3 0
2 years ago
If the mean of a positively skewed distribution is 122, which of these values could be the median of the distribution?
frosja888 [35]

In a positively skewed distribution, the extreme scores are larger, thus the mean is larger than the median. Since the mean is 122, the only possible median is 118. Therefore, D.


I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
8 0
2 years ago
Read 2 more answers
Find the value of x³+ y³ + z³ – 3xyz if x² + y² + z² = 83 and x + y + z = 15​
raketka [301]

identity used is

x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).

then use

(x+y+z)² = x²+y²+z²+2(xy+yz+xz)

225= 83 + 2(xy+yz+xz)

xy+yz+xz = (225-83)/2

xy+yz+xz= 142/2

xy+yz+xz= 71

ok

now use identity

x³ + y³+ z³– 3xyz = (x + y + z) (x² + y² + z² – xy – yz – zx).

now

x³ + y³+ z³– 3xyz = 15 (83 – xy – yz – zx).

= 15[83 - (71)]

= 15×12

=180

4 0
3 years ago
Can somebody help me on this
olchik [2.2K]

Answer:

Subtract 4 from both sides

7 0
3 years ago
Read 2 more answers
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