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3 years ago

-4+7-2(3+1) Orders of Operations

Mathematics

1 answer:

VashaNatasha [74]3 years ago

4 0

Answer:

-5

Step-by-step explanation:

BODMAS

-4+7-2(3+1)

bracket first

-4+7-2(4)

multiply

-4+7-8

addition

3-8

-5

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Step-by-step explanation:

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3 years ago

The length of a rectangle is twice its width. Find its area, if its perimeter is 7 1/3 cm The area of the rectangle is _sq. cm.

Harman [31]

Answer:

The area of rectangle is $2\frac{80}{81}\ cm^2$

Step-by-step explanation:

we know that

The perimeter of a rectangle is equal to

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we have

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$\frac{22}{3}=2(L+W)$

$\frac{11}{3}=(L+W)$ ----> equation A

Remember that

The length of a rectangle is twice its width.

$L=2W$ ----> equation B

substitute equation B in equation A

$\frac{11}{3}=(2W+W)$

solve for W

$W=\frac{11}{9}\ cm$

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$L=2(\frac{11}{9})$

$L=\frac{22}{9}\ cm$

Find the area of rectangle

$A=LW$

substitute the values

$A=(\frac{22}{9})(\frac{11}{9})$

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Convert to mixed number

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