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uysha [10]
3 years ago
15

The substraction of a matrix B may be considered as the addition of the matrix (-1)B. Dose the commutative law of addition permi

t us to atate that A - B = B - A? If not, how would you correct the statement?
Mathematics
1 answer:
GuDViN [60]3 years ago
6 0

Answer:  The corrected statement is A - B = -B + A.

Step-by-step explanation:  Given that the subtraction of a matrix B may be considered as the addition of the matrix (-1)B.

We are given to check whether the commutative law of addition permit us to state that A - B = B - A.

If not, We are to correct the statement.

If the subtraction A - B is considered a the addition A + (-B), then the commutative law should be stated as follows :

A + (-B) = (-B) + A.

That is, A - B = -B + A.

Thus, the corrected statement is A - B = -B + A, not B - A.

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Answer:

B. No. The product of two fractions is the product of the numerators divided by the product of the denominators.

Step-by-step explanation:

For A: A is clearly false because you can multiply any fraction and it doesnt matter what the denominator is.

For B: The first part is correct, which is that to multiply two fractions, they dont have to have like/common denominators, the explanation part is also correct. When we multiply we multiply the numerator to the numerator and the denominator to the denominator.

For C: C is false because the first part says yes and we know that you can multiply any 2 fractions regardless of denominators.

For D: For D the first part is correct however, the explanation section is false you dont multiply the numerator to the denominator.

For E: You don't have to find the equivalent fraction to multiply because you can do that afterward.

I hope this helps, have a blessed day! :D

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2 years ago
Write an expression that shows 9 less than the product of 11 and 3.5
Alex73 [517]

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a square with an area of 144 cm² is reduced by a factor of 1/3 how long are the new sides of the square?​
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Answer:

4  cm

Step-by-step explanation:

The square root of 144 is 12 (12 x 12 = 144) so we know our sides of the square are 12 cm²

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The sides of the new square are 4 :)

Hope this helps and is correct, have a nice day! :D

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