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3 years ago

14

Anna has purchased three gift for her closest friends. She decides to wrap them in holiday paper. How many square inches of wrap

ping paper will she need if the boxes are cubes with a side length of 7 inches?

2 answers:

cestrela7 [59]3 years ago

7 0

I am not super sure but I did the math and it’s 84 square inches

krok68 [10]3 years ago

4 0

Here the gift is of the shape of cube.

So in order to wrap the gift we need to find the surface area of cube.

The formula to find surface area of cube is given by:

$S.A.=6a^{2}$

Where a is length of each edge.

So let us find surface area of one cube.

Length of side length (edge) is given as 7 inches.

Plugging this in the formula:

$S.A.=6(7)^{2}$

Surface Area of one cube = 294 square inches.

Now Anna purchased Three gifts.

So Surface area of three gifts = 3*294 = 882 square inches.

Answer: Total wrapping paper required by Anna is 882 square inches.

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lora16 [44]

Answer:

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Let:

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For Doug:

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Solving for the price of both items:

We have:

$4H + 3P = 13.75$ --- (1)

$2H + 5P = 11.25$ --- (2)

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-------------------

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