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3 years ago

Im strugling on these question

Mathematics

1 answer:

vivado [14]3 years ago

5 0

Answer and Step-by-step explanation:

How're you struggling with this? Simply look for a point that is inside of the triangle.

The answer is A. (-1, -2)

because this point is INSIDE the triangle.

#teamtrees #PAW (Plant And Water)

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If you can answer this you get 20 points

KonstantinChe [14]

Answer:

Rate of change for the second one (at the top) is 10

x- intercept is (-10,0)

y- intercept is (0,20)

Step-by-step explanation:

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3 years ago

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What is the surface area of the right cone below?

olga2289 [7]

B. 4967 units idjdnndndndnndndndnndnd

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4 years ago

Find the directional derivative of f(x,y,z)=z3−x2yf(x,y,z)=z3−x2y at the point (−5,5,2)(−5,5,2) in the direction of the vector v

olga_2 [115]

We are given

$f=z^3 -x^2y$

Firstly, we can find gradient

so, we will find partial derivatives

$f_x=0 -2xy$

$f_x=-2xy$

$f_y=0 -x^2$

$f_y=-x^2$

$f_z=3z^2$

now, we can plug point (-5,5,2)

$f_x=-2*-5*5=50$

$f_y=-(-5)^2=-25$

$f_z=3(2)^2=12$

so, gradient will be

$gradf=(50,-25,12)$

now, we are given that

it is in direction of v=⟨−3,2,−4⟩

so, we will find it's unit vector

$|v|=\sqrt{(-3)^2+(2)^2+(-4)^2}$

$|v|=\sqrt{29}$

now, we can find unit vector

$v'=(\frac{-3}{\sqrt{29} } , \frac{2}{\sqrt{29} } , \frac{-4}{\sqrt{29} })$

now, we can find dot product to find direction of the vector

$dir=(gradf) \cdot (v')$

now, we can plug values

$dir=(50,-25,12) \cdot (\frac{-3}{\sqrt{29} } , \frac{2}{\sqrt{29} } , \frac{-4}{\sqrt{29} })$

$dir=(-\frac{150}{\sqrt{29} } - \frac{50}{\sqrt{29} } - \frac{48}{\sqrt{29} })$

$dir=-\frac{248\sqrt{29}}{29}$ .............Answer

7 0

4 years ago

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John rode 4 kilometers on his bike his sister sally rode 3400 meters on her bike who rode the farthest and how much farther did

emmasim [6.3K]

4 kilometres is 4000 meters

4000 meters - 3400 meters = 600 meters

and as John is the one that rode 4 kilometres he rode further and by 600 meters

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4 years ago

If a track has 219 miles and takes 108 minutes to get there. Is the average speed 104 miles per hour

Tema [17]

Answer:

122 miles per hour. 

Step-by-step explanation:

Time:108 min ÷60 =1.8 hours

Speed = distance /time = 219/1.8 =122 miles per hour.

Hope this helps..

8 0

3 years ago

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Im strugling on these question​

Im strugling on these question