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Elena-2011 [213]
3 years ago
11

The image below is made from a regular octagon and a regular triangle. What is the value of x?

Mathematics
1 answer:
notsponge [240]3 years ago
7 0
For some reason I think it’s 60 but hopefully I’m right?! シ
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vampirchik [111]

Answer:

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Step-by-step explanation:

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3 years ago
Evaluate 5(x - 1) - 2 when x = 3.<br> ОА. 12<br> ОВ. -4<br> Ос. о.<br> O D. 8
Harlamova29_29 [7]

Answer:

8

Step-by-step explanation:

5(3-1)-2

5(2)-2

10-2

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3 years ago
Read 2 more answers
Find a particular solution to y" - y + y = 2 sin(3x)
leonid [27]

Answer with explanation:

The given differential equation is

y" -y'+y=2 sin 3x------(1)

Let, y'=z

y"=z'

\frac{dy}{dx}=z\\\\d y=zdx\\\\y=z x

Substituting the value of , y, y' and y" in equation (1)

z'-z+zx=2 sin 3 x

z'+z(x-1)=2 sin 3 x-----------(1)

This is a type of linear differential equation.

Integrating factor

     =e^{\int (x-1) dx}\\\\=e^{\frac{x^2}{2}-x}

Multiplying both sides of equation (1) by integrating factor and integrating we get

\rightarrow z\times e^{\frac{x^2}{2}-x}=\int 2 sin 3 x \times e^{\frac{x^2}{2}-x} dx=I

I=\frac{-2\cos 3x e^{\fra{x^2}{2}-x}}{3}+\int\frac{2x\cos 3x e^{\fra{x^2}{2}-x}}{3} dx -\int \frac{2\cos 3x e^{\fra{x^2}{2}-x}}{3} dx\\\\I=\frac{-2\cos 3x e^{\fra{x^2}{2}-x}}{3}+\int\frac{2x\cos 3x e^{\fra{x^2}{2}-x}}{3} dx-\frac{2I}{3}\\\\\frac{5I}{3}=\frac{-2\cos 3x e^{\fra{x^2}{2}-x}}{3}+\int\frac{2x\cos 3x e^{\fra{x^2}{2}-x}}{3} dx\\\\I=\frac{-2\cos 3x e^{\fra{x^2}{2}-x}}{5}+\int\frac{2x\cos 3x e^{\fra{x^2}{2}-x}}{5} dx

8 0
2 years ago
For parties of six or more, a restaurant adds a 20% gratuity (or tip). Ifa
ser-zykov [4K]

Answer:

$247.37

Step-by-step explanation:

3 0
2 years ago
Simplify (-5)^5 over (-5)^-6
xxMikexx [17]

Answer:

− 48828125

Step-by-step explanation:

you can use a calculator for algebra

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