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Savatey [412]
3 years ago
14

If it took 4 hours to clean 8 houses, how many houses could be cleaned in 7 hours

Mathematics
2 answers:
Natasha2012 [34]3 years ago
4 0

Answer:

14

Step-by-step explanation:

you clean 2 a hour so 7*2=14

ch4aika [34]3 years ago
4 0

Answer:

14 houses

Step-by-step explanation:

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Can we obtain a diagonal matrix by multiplying two non-diagonal matrices? give an example
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Yes, we can obtain a diagonal matrix by multiplying two non diagonal matrix.

Consider the matrix multiplication below

\left[\begin{array}{cc}a&b\\c&d\end{array}\right]   \left[\begin{array}{cc}e&f\\g&h\end{array}\right] =  \left[\begin{array}{cc}a e+b g&a f+b h\\c e+d g&c f+d h\end{array}\right]

For the product to be a diagonal matrix,

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The the matrix product becomes:

\left[\begin{array}{cc}1&2\\3&4\end{array}\right] \left[\begin{array}{cc}\frac{1}{3}&-1\\-\frac{1}{4}&\frac{1}{2}\end{array}\right] = \left[\begin{array}{cc}\frac{1}{3}-\frac{1}{2}&-1+1\\1-1&-3+2\end{array}\right]= \left[\begin{array}{cc}-\frac{1}{6}&0\\0&-1\end{array}\right]

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No, it is not a function.
Since all the lines have been drawn in the grid line do not have any connection between them even a point in common.
I hope this has been useful for you.
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Answer:

B

Step-by-step explanation:

B is correct...

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