3 years ago

Can you show me the answer?

Mathematics

1 answer:

MatroZZZ [7]3 years ago

7 0

Answer:

I can't even see the picture. I'm sorry.

Step-by-step explanation:

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3 years ago

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3 years ago

How to solve this equation and check it. a - 2.5 = 4.5?

Bezzdna [24]

Answer:

Step-by-step explanation:

a - 2.5 = 4.5

2.5 = 2.5

a = 7.0 or 7

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4 years ago

Deidre has 25 feet of wrapping paper. She uses 13 feet to wrap some gifts. How many inches of wrapping paper is left?

victus00 [196]

Answer: 144 inches left

Step-by-step explanation: 25-13=12

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3 years ago

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A cylinder with a radius of 1 cm and a height of 21 cm has the same volume as a cone with a height of 7 cm. What is the radius o

Natasha_Volkova [10]

Answer:

Step-by-step explanation:

The formula of a volume of a cylinder:

$V=\pi r^2H$

r - radius

H - height

We have r = 1cm and H = 21cm. Substitute:

$V=\pi(1^2)(21)=21\pi\ cm^3$

The formula of a cone:

$V=\dfrac{1}{3}\pi r^2H$

r - radius

H - height

We have V = 21π cm³ and H = 7cm. Substitute:

$\dfrac{1}{3}\pi(r^2)(7)=21\pi$ <em>divide both sides by π</em>

$\dfrac{1}{3}(7)(r^2)=21$ <em>divide both sides by 7</em>

$\dfrac{1}{3}r^2=3$ <em>multiply both sides by 3</em>

$r^2=9\to r=\sqrt9\\\\r=3\ cm$

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3 years ago

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Can you show me the answer?​

Can you show me the answer?