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yKpoI14uk [10]
3 years ago
5

The length of a rectangle is four times its width.

Mathematics
1 answer:
12345 [234]3 years ago
5 0
I think it would be 324 divided by 4 = 81 in.
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One third times 5 and one forth
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1.75

Step-by-step explanation:

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Solve the equation.<br><br> 3(n+4)=12(6n+4)
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Which coordinate pair is a solution of the linear
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4 0
3 years ago
(5n2 – 4nm - 9m²) + (7n2 + 4nm +8m²) =
Flauer [41]

Answer:

\left(5n^2-4nm-9m^2\right)+\left(7n^2+4nm+8m^2\right)=12n^2-m^2

Step-by-step explanation:

Given the expression

\left(5n^2\:-\:4nm\:-\:9m^2\right)\:+\:\left(7n^2\:+\:4nm\:+8m^2\right)

Remove parentheses: (a) = a

=5n^2-4nm-9m^2+7n^2+4nm+8m^2

Group like terms

=5n^2+7n^2-4nm+4nm-9m^2+8m^2

Add similar elements: 5n^2+7n^2=12n^2

=12n^2-4nm+4nm-9m^2+8m^2

Add similar elements: -4nm+4nm=0

=12n^2-9m^2+8m^2

Add similar elements:  -9m^2+8m^2=-m^2

=12n^2-m^2

Therefore, we conclude that:

\left(5n^2-4nm-9m^2\right)+\left(7n^2+4nm+8m^2\right)=12n^2-m^2

5 0
3 years ago
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