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Nikitich [7]
3 years ago
7

Who was the first multi-millionaire ​

Mathematics
2 answers:
ad-work [718]3 years ago
7 0

Answer:

John Jacob Astor

Step-by-step explanation:

Hope this helps!

hichkok12 [17]3 years ago
6 0

Answer:

John Jacob Astor..............

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the area of a pentagon increased by 27 is the same as four times the difference of area and 15. what is the area of the pentagon
AfilCa [17]
This can be written as:
a+27=4(15-a)
now to work it out
a+27=4(15-a)
a+27=60-4a
4a+27=60
4a=33
a=8.25

<span>hope this helps :)</span>
6 0
3 years ago
What is x, if the volume of the cylinder is 768pi rcm3?
AVprozaik [17]

let's recall Cavalieri's Principle, <u>solids with equal altitudes and cross-sectional areas at each height have the same volume</u>, so even though this cylinder is slanted with a height = x and a radius = 8, the cross-sectional areas from the bottom to top are the same thickness and thus the same area, so its volume will be the same as a cylinder with the same height and radius that is not slanted.

\bf \textit{volume of a cylinder}\\\\ V=\pi r^2 h~~ \begin{cases} r=radius\\ h=height\\ \cline{1-1} r=8\\ h=x\\ V=768\pi \end{cases}\implies 768\pi =\pi (8)^2(x)\implies 768\pi =64\pi x \\\\\\ \cfrac{768\pi }{64\pi }=x\implies 12=x

5 0
3 years ago
What is the derivative of f(x) = x(6^-2x)
Bas_tet [7]

Step-by-step explanation:

This is flamingo what is my newest video.

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4 0
3 years ago
Please help to solve this.<br> Find sin5x,if sinx+cosx=1,4
MrMuchimi

Answer:

Hello,

Step-by-step explanation:

we must first remember that:

\boxed{sin(5x)=5sin(x)-20*sin^3(x)+16*sin^5(x)}\\\\

Let say t=sin(x)

sin(x)+cos(x)=1.4\\\\t+\sqrt{1-t^2}=1.4\\\sqrt{1-t^2}=1.4-t\ we\ square\\1-t^2=1.4^2+t^2-2.8*t\\2t^2-2.8*t+0.96=0\\\Delta=2.8^2-4*2*0.96=0.16=0.4^2\\\\t=\dfrac{2.8-0.4}{4} =0.6\ or\ t=\dfrac{2.8+0.4}{4}=0.8\\\\t^3=0,216\ or\ t^3=0,512\\\\t^5=0,07776\ or\ t^5=0,32768\\\\\boxed{sin(5x)=5*0.6-20*0.216+16*0.07776=-0,07584}\\\\or\\\\\boxed{sin(5x)=5*0.8-20*0.512+16*0.32768=-0,99712}

8 0
3 years ago
the slope of the line below is 3. write the point-slope equation for the line using the coordinates of the labeled point. ​
umka21 [38]

Answer:

y - 8 = 3(x - 6)

Step-by-step explanation:

The standard point slope formula for the equation of a circle is

y - h = m(x - k)

Here, h = 6, k = 8 and m = 3.  Then we have:

y - 8 = 3(x - 6)

7 0
3 years ago
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