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3 years ago

A. Is the statement "Every elementary row operation is reversible" true or false? Explain.

Mathematics

1 answer:

Tatiana [17]3 years ago

3 0

Answer:

This statement is "TRUE".

Step-by-step explanation:

Every elementary row operation is reversible. You can get the reverse answer by multiplying by a constant or by multiplying by its inverse. You can add one row to another row and subtract row 1 from row 2 to get it back.

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$-18x^2y^6$

Step-by-step explanation:

we have

$(3xy^2)(-6xy^4)$

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What is the solution to the equation StartFraction y Over y minus 4 EndFraction minus StartFraction 4 Over y + 4 EndFraction = S

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Step-by-step explanation:

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3 years ago

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4. Suppose P(A) = 0.48 and P(B) = 0.62. a. Can A and B be mutually exclusive? Why or why not. b. If A and B are independent, the

kenny6666 [7]

Answer:

Step-by-step explanation:

a) Two events A,B are said to be mutually exlusive if any of the following occurs.

- A and B have an empty intersection

- A= B^c and their union is the whole sample space

- P(A intersection B) =0

REcall the following formula

$P(A\cupB ) = P(A)+P(B)-P(A\cap B)$

Note that P(A) + P(B) = 1.1. Since the probability is always a number between 0 and 1, it must happen that $P(A\cap B) >0$ , otherwise, $A\cup B$ would have a probability greater than 1. Hence, A, B are not mutually exclusive.

b) by definition, if two events are indepent, we have that the probability of the intersection is equal to products of their probabilites. Or

$P(A\cap B) = P(A)P(B)$

c) Recall that if we have mutuallly exclusive events A, B, then we have that $P(A\cap B)=0$ , if they were independent, we would have the following

$P(A) P(B) =0$

which necesarilly implies that at least one of the two events has 0 probability. (THis is not the case)

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4 years ago

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Answer:

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Step-by-step explanation:

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A. Is the statement​ "Every elementary row operation is​ reversible" true or​ false? Explain.

A. Is the statement "Every elementary row operation is reversible" true or false? Explain.