2 years ago

What is the surface area

Mathematics

2 answers:

Ivenika [448]2 years ago

4 0

348 I believe.......
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Alina [70]2 years ago

4 0

348 is the surface area.

Hope this helped!☺

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koban [17]

Answer:

Part 1:

Yes, the side lengths form a right triangle.

Part 2:

Option d 37.1 cm

Explanation:

We need to use the pythagorean theorem.

In part 1, if the 3 side lengths are a right triangle, then, they must verify:

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By the theorem. Then:

$\begin{gathered} 7.5^2=56.25 \\ 4.5^2+6^2=20.25+36=56.25 \end{gathered}$

They're equal, then the lengths correspond to a right triangle.

For part 2, we need to use again the theorem. In this case:

$\begin{gathered} 12^2+x^2=39^2 \\ x=\sqrt{1521-144} \\ x=\sqrt{1377} \\ x\approx37.1cm \end{gathered}$

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3 years ago

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Alla [95]

$14.20 is the cost of each book

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2 years ago

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Fiesta28 [93]

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1 year ago

Hi can someone help me with this

Ad libitum [116K]

Answer:

25 units

Step-by-step explanation:

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