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3 years ago

Can someone help me with geometry

Mathematics

2 answers:

Vinil7 [7]3 years ago

7 0

whats the question then?

shutvik [7]3 years ago

5 0

What is the question?

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Find the volumes of the solids generated by revolving the triangle with vertices (2, 2), (2, 6), and (5, 6) about a) the x-a

Vesna [10]

About the $x$ -axis (washer method):

$\displaystyle\pi\int_2^5\left(6^2-\left(\frac43x-\frac23\right)^2\right)\,\mathrm dx=\frac{16\pi}9\int_2^5(20+x-x^2)\,\mathrm dx=\boxed{56\pi}$

About the $y$ -axis (shell method):

$\displaystyle2\pi\int_2^5x\left(6-\left(\frac43x-\frac23\right)\right)\,\mathrm dx=\frac{8\pi}3\int_2^5x(5-x)\,\mathrm dx=\boxed{36\pi}$

About $x=7$ (shell method):

$\displaystyle2\pi\int_2^5(7-x)\left(6-\left(\frac43x-\frac23\right)\right)\,\mathrm dx=\frac{8\pi}3\int_2^5(35-12x+x^2)\,\mathrm dx=\boxed{48\pi}$

About $y=2$ (washer method):

$\displaystyle\pi\int_2^5\left((6-2)^2-\left(\frac43x-\frac23-2\right)^2\right)\,\mathrm dx=\frac{16\pi}9\int_2^5(5+4x-x^2)\,\mathrm dx=\boxed{32\pi}$

7 0

3 years ago

Help will name Brainliest

kogti [31]

Answer:

x = 5

Step-by-step explanation:

using the sine or cosine ratio in the right triangle and the exact value

sin30° = $\frac{1}{2}$ , then

sin30° = $\frac{opposite}{hypotenuse}$ = $\frac{x}{10}$ = $\frac{1}{2}$ ( cross- multiply )

2x = 10 ( divide both sides by 2 )

x = 5

3 0

2 years ago

A reflection through what line will move p(6,-13) to p(6,13)

Vedmedyk [2.9K]

A reflection across the x axis

y=0

4 0

3 years ago

2 |n + 10|= -2<br><br> solve the equation

MissTica

2n + 20 = -2

20 + 2 = -2n

22 = -2n

22/2 = n

11 = n

3 0

3 years ago

Evaluate: 8(2) – 2(4)

Ivenika [448]

Answer:

Step-by-step explanation:

8(2) - 2(4)

16 - 8

3 0

3 years ago

Can someone help me with geometry ​

Can someone help me with geometry