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eimsori [14]
4 years ago
10

HELP MEEEEE PLEASEEEEEEEE WILL GIVE BRAINLIEST

Mathematics
1 answer:
Aneli [31]4 years ago
4 0

Answer:

A. 21x+6

Step-by-step explanation:

3(6x+2+x) = 3(7x+2)

3(7x+2) = 21x+6

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A cylinder and a cone have the same volume. The cylinder has radius x and height y. The cone has radius 1/3x. Find the height of
slavikrds [6]

Answer:

The height of the cone h = 27(x^4)y

Step-by-step explanation:

Firstly, we calculate the volume of the cylinder.

Mathematically, the volume of the cylinder is pi * r^2 * h

using the radius x and height y

The volume V of the cylinder is ;

V = pi * x^2 * y

Now we know they have the same volume V, the formula for the volume of a cone is ;

1/3 * pi * r^2 * h

Substituting the values of r to be 1/3x and the height which is not given here left as h, we have the volume of the cone to be;

V = 1/3 * pi * (1/3x)^2 * h = pi * x^2 * y

The pi gives way as it cancels out on both sides and we have the following;

h/27x^2 = x^2y

Mathematically h = x^2 * y * 27x^2

h = 27(x^4)y

p.s: I personally feel the radius of the cone was to be given as x/3 and not 1/3x . It is in that way we can have the height of the cone purely in y terms and no x

8 0
3 years ago
Look at the 2 fractions below. Choose which are equivalent fractions from the choices. Hint: There may be more than 1 correct an
sergeinik [125]
2/12 and 9/12 is right. 4/24 and 18/24 is right. So, answers A and D are right
6 0
3 years ago
Read 2 more answers
The perimeter of the original rectangle on the left is 30 meters. The perimeter of the reduced rectangle on the right is 24
kherson [118]

Answer:

The answer is 5.

Step-by-step explanation:

It's the only one that makes sense, and i took the quiz and got 100%

You're welcome :D

4 0
3 years ago
Zach did 1/6 of his math homework in 1/2 an hour. How much can he do in one hour?
jekas [21]
Answer: 1/3
Explanation: Zach does 1/6 in 30 minutes (1/2 an hour), in an hour Zach can complete 2/6 of his homework. Simplify to 1/3.
8 0
3 years ago
PLEASE HELP WITH THIS ONE QUESTION
Snezhnost [94]

Answer:

The fourth option.

Step-by-step explanation:

In the given equation x^2 + 4x + 9 = 0, a=1, b=4, and c=9. The quadratic formula is in the attachment below so if you plug in a, b, and c you get the fourth option.

8 0
3 years ago
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