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3 years ago

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

klemol [59]

Answer:

1.75

Step-by-step explanation:

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2 years ago

Solve the equation.<br><br> 3(n+4)=12(6n+4)

Crank

Answer:

n = -12/23

Step-by-step explanation:

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3 years ago

Which coordinate pair is a solution of the linear

Alika [10]

Answer:

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3 years ago

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Nimfa-mama [501]

Answer:

x= 40°

Step-by-step explanation:

Please see attached picture for full solution.

Key concepts:

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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