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kvv77 [185]
3 years ago
11

Which expression results in a sum or difference of three and ten forty seconds

Mathematics
1 answer:
Ne4ueva [31]3 years ago
8 0
<h3>Hello There, today we will solve your problem,</h3>

Number 1,

Since we know the outcome to the equation has to 3\frac{10}{43}, we can solve each problem regularly to get the answer

_________________

\huge\blue{\mid{\fbox{\tt{NUMBER\:ONE}}\mid}}

  1. Solve for the difference

6\frac{5}{7}-6\frac{2}{6}\\\\3\frac{8}{21}

_________________

\huge\blue{\mid{\fbox{\tt{NUMBER\:TWO}}\mid}}

We simply can eliminate this option due to it being addition, when one of the numbers is already bigger than what we want,

_________________

\huge\blue{\mid{\fbox{\tt{NUMBER\:THREE}}\mid}}

  1. Solve for the difference

8\ \frac{8}{14}-5\ \frac{1}{3}\\\\3 \frac{5}{21}

This equation also equals to 3 \frac{10}{42}, so we found our answer!

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Answer:

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Step-by-step explanation:

The first thing is to calculate the dimensions of each matrix, that is, the number of rows x number of columns:

dimensions of A: 2x2

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D dimensions: 1x3

 We have that a matrix multiplication is defined, the internal numbers of its dimensions must be the same: we analyze each option:

 

BA: (2x3) * (2x2): the internal numbers do not match (a 3 for B and a 2 for A), so the multiplication of the matrix is not defined

 

BC: (2x3) * (3x3): the internal numbers are both 3, so the matrix multiplication is defined

 

CB: (3x3 ) * (2x3): the internal numbers do not match (a 3 for C and a 2 for B), so the multiplication of the matrix is not defined

 

CD: (3x3) * (1x3): the internal numbers do not match (a 3 for C and a 1 for D) so the multiplication of the matrix is not defined

Therefore the answer is b. BC

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Step-by-step explanation:

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