3 years ago

Help please, giving brainlist to anyone who answers

Mathematics

1 answer:

4vir4ik [10]3 years ago

7 0

Answer:

the answer is 4

Step-by-step explanation:

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Evaluate :<br> 5 - 3 x when x = - 7<br> Substitute - 7 for x.

monitta

Answer:

26 because if x= -7 then -3 X - 7 = +21

+21 +5 = 26

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3 years ago

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Pls help with this question

Andreyy89

Answer:

7.01, 10, 7.1, 12, 7.001, 8, 15

Step-by-step explanation:

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Graph the equation of the line for the equation , y = 3x-12

tamaranim1 [39]

Answer:

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3 years ago

Josh rented a truck for one day. There was a base fee of$14.99,and there was an additional charge of81cent for each mile driven.

BigorU [14]

$117.05
- $ 14.99
-------------
$102.46 left

Divide 102.46 by 0.81, and you get 126, which makes it 126 miles.

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4 years ago

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Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=x2+y2−−−−−−√

TiliK225 [7]

Parameterize the part of the sphere by

$\mathbf s(u,v)=(9\cos u\sin v,9\sin u\sin v,9\cos v)$

with $0\le u\le2\pi$ and $0\le v\le\dfrac\pi4$ . Then

$\mathrm dS=\|\mathbf s_u\times\mathbf s_v\|=81\sin v\,\mathrm du\,\mathrm dv$

So the area of $S$ (the part of the sphere above the cone) is given by

$\displaystyle\iint_S\mathrm dS=81\int_{v=0}^{v=\pi/4}\int_{u=0}^{u=2\pi}\sin v\,\mathrm du\,\mathrm dv=81(2\pi)\left(1-\dfrac1{\sqrt2}\right)=(162-81\sqrt2)\pi$

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4 years ago