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3 years ago

Please Help ASAP!! Round 287.9412 to the nearest tenth. Do not write extra zeros.

Mathematics

2 answers:

velikii [3]3 years ago

7 0

Answer:sure

Step-by-step explanation:

287.9000

also, i learned about decimals just now, so i'm pretty fresh.

irinina [24]3 years ago

4 0

Answer:

287.9

Step-by-step explanation:

4 or less let it rest 5 or more add one more

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Consider the following. f(x, y, z) = x2yz − xyz8, P(6, −1, 1), u = 0, 4 5 , − 3 5 (a) Find the gradient of f. ∇f(x, y, z) = (b)

Darina [25.2K]

Answer:

a) ∇f(x, y, z) = (2xyz − yz⁸, x²z − xz⁸, x²y − 8xyz⁷)

b) ∇f(6, −1, 1) = (-11, 30, 12)

c) Duf(6, −1, 1) = 84/5

Step-by-step explanation:

Given

f(x, y, z) = x²yz − xyz⁸

P(6, −1, 1)

u = (0, 4/5, − 3/5)

a) ∇f(x, y, z) = ?

We apply

fx(x, y, z) = 2xyz − yz⁸

fy(x, y, z) = x²z − xz⁸

fz(x, y, z) = x²y − 8xyz⁷

then

∇f(x, y, z) = (2xyz − yz⁸, x²z − xz⁸, x²y − 8xyz⁷)

b) ∇f(6, −1, 1) = (2*6*(-1)*1 − (-1)(1)⁸, (6)²(1) − (6)(1)⁸, (6)²(-1) − 8(6)(-1)(1)⁷)

⇒ ∇f(6, −1, 1) = (-11, 30, 12)

c) Duf(6, −1, 1) = ∇f(6, −1, 1)*(0, 4/5, − 3/5) = (-11, 30, 12)*(0, 4/5, − 3/5)

⇒ Duf(6, −1, 1) = 0 + 24 - 36/5 = 84/5

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3 years ago

For all real numbers a and b, 2a • b = a2 + b2. <br> True or False ? Explain.

vekshin1

False. You can pick any two numbers, but not the same number, to show its false. try it

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3 years ago

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Can someone help me with this

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As this is a fraction, we need to find values where the denominator is equal to 0.

$b^2-2b-8=0$
$(b-4)(b+2)$
$b=4 \vee b=-2$

So the answer is B.

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2 years ago

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a delivery company charges an extra fee for a package that weighs more than 100 pounds write an inequality that shows the weight

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Answer:

$w\leq 100\ pounds$

Step-by-step explanation:

Let

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