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diamong [38]
3 years ago
15

What is the image of the point (-9,-1) after a rotation of 270 degrees counterclockwise about the origin?

Mathematics
1 answer:
Hunter-Best [27]3 years ago
3 0

Answer:

(-1,9)

Step-by-step explanation:

coortinate point is (-9,-1)

use formula

(x,y)=(y,-x)

(-9,-1)=(-1,9)

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Answer: 112°

Step-by-step explanation:

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3 0
3 years ago
A cylinder with a radius of 12cm and a height of 20cm has the same volume as a cone with a radius of 8cm. What is the height of
ivanzaharov [21]

Answer: 135cm

Step-by-step explanation

Volume of a cylinder = πr²h

Volume of a cone. = 1/3πr²h

The two shapes are both solid shapes.

Since the have same volume, we can then equate the two together and solve for the height of the cone.

Now make H the height and R the radius of the cylinder and h the height and r the radius of the cylinder.

Now equating the two

πR²H = 1/3πr²h

Now substitute for the values now

Multiply through by 3

3πR²H = πr²h

But π is common so it could be obliterated from the equation

3R²H = r²h

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8640. = 64h

Therefore

h = 8640/64

= 135cm

8 0
3 years ago
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Answer:

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Step-by-step explanation:

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