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2 years ago

If the endpoints of AB are A(-1,3), B(7,-1) What is the coordinate of the midpoint M

Mathematics

1 answer:

Kay [80]2 years ago

3 0

Answer:

Step-by-step explanation:

bbbnm

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The probability that a fair coin tossed 10 tines will land heads up on all ten tosses is 1 out of

Sidana [21]

1/10 because you will do it 10 times

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3 years ago

the number of free song downloads is determined using a ratio. When you purchase 40 songs, you get 24 free downloads. How many s

Artemon [7]

That answer will be 30 songs.

In order to get that answer you must multiply 40 by 18 which is 720 and divide it by 24 . Finally you get the answer 30 songs.

Hope it helps :]

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3 years ago

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What is the length of ac?

olga55 [171]

Answer: 144 cm

Step-by-step explanation:

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3 years ago

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Find the length of the curve. R(t) = cos(8t) i + sin(8t) j + 8 ln cos t k, 0 ≤ t ≤ π/4

arsen [322]

we are given

$R(t)=cos(8t)i+sin(8t)j+8ln(cos(t))k$

now, we can find x , y and z components

$x=cos(8t),y=sin(8t),z=8ln(cos(t))$

Arc length calculation:

we can use formula

$L=\int\limits^a_b {\sqrt{(x')^2+(y')^2+(z')^2} } \, dt$

$x'=-8sin(8t),y=8cos(8t),z=-8tan(t)$

now, we can plug these values

$L=\int _0^{\frac{\pi }{4}}\sqrt{(-8sin(8t))^2+(8cos(8t))^2+(-8tan(t))^2} dt$

now, we can simplify it

$L=\int _0^{\frac{\pi }{4}}\sqrt{64+64tan^2(t)} dt$

$L=\int _0^{\frac{\pi }{4}}8\sqrt{1+tan^2(t)} dt$

$L=\int _0^{\frac{\pi }{4}}8\sqrt{sec^2(t)} dt$

$L=\int _0^{\frac{\pi }{4}}8sec(t) dt$

now, we can solve integral

$\int \:8\sec \left(t\right)dt$

$=8\ln \left|\tan \left(t\right)+\sec \left(t\right)\right|$

now, we can plug bounds

and we get

$=8\ln \left(\sqrt{2}+1\right)-0$

so,

$L=8\ln \left(1+\sqrt{2}\right)$ ..............Answer

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3 years ago

What is the answer to this problem-k-6-7k+20=-2

STatiana [176]

Answer:

K=2 that is the answer

6 0

3 years ago