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3 years ago

2n + 5 = n - 7 Solution: ?

Mathematics

1 answer:

horsena [70]3 years ago

5 0

Answer:

Step-by-step explanation:

2n + 5 = n - 7 <em>subtract 5 from both sides</em>

2n + 5 - 5 = n - 7 - 5

2n = n - 12 <em>subtract n from both sides</em>

2n - n = n - n - 12

n = -12

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sphere and a cylinder have the same radius and height. The volume of the cylinder is 54 meters cubed. Amie found the volume of t

Fiesta28 [93]

Answer:

Amie should have multiplied 54 by 2/3

Step-by-step explanation:

The formula of the volume of a sphere is given by

$\frac{4}{3}\pi r^3$ , where r is the radius of the sphere.

to find the volume of the sphere, we must find $r^3$

We know that the formula of a cylinder of height h and radius r is given by

$\pi r^2h$

So $54 = \pi r^2 h$

We know that the sphere and the cylinder have the same height. Recall that the height of the sphere of radius r, is the diameter of a circle that passes through the heighest and lowest points of the sphere. Then, h=2r. This means that

$54 = 2\pi r^3$

From here, we know that $\pi r^3 = \frac{54}{2}$ .

So the volume of the sphere is $\frac{4}{3}\frac{54}{2} = \frac{2}{3}\cdot54$ .

So Amie should have multiplied 54 by 2/3.

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4 years ago

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What is (Alpha + ß )^2 = ??

tensa zangetsu [6.8K]

(α + β)²

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= α(α + β) + β(α + β)

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

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alisha [4.7K]

Answer:

Step-by-step explanation:

1. Isolate Y by subtracting 13x from both sides

2. Divide the whole equation by the coefficient of y (-11)

Final Equation

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Hope this helps! :)

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3 years ago

Pls help “Given f(x)=2x^2-5x evaluate f(-4).”

Molodets [167]

Step-by-step explanation:

2x^2-5x

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3 years ago

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