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3 years ago

Guys you are awesome. Can you help me again?

Mathematics

1 answer:

salantis [7]3 years ago

8 0

The correct answer is B

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Solve: -5√x= -15 a: x=-9 b: x= -7 c: x=9 d: x=7

babymother [125]

Divide both sides by -5
Sqrt(x) = 3
We want to isolate x to solve for it. The opposite of a square root is a square, so square both sides.
x = 9
It can't be -9 because the square root of negative numbers are not real numbers.

4 0

3 years ago

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SLOVE THIS QUESTION

eduard

The answer is 1561 yuans and 27 jiao.

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3 years ago

Find the volume of the largest rectangular box in the first octant with three faces in the coordinate planes and one vertex in t

Tresset [83]

Answer: The volume of largest rectangular box is 4.5 units.

Step-by-step explanation:

Since we have given that

Volume = $xyz$

with subject to $x+2y+3z=9$

So, let $z=\dfrac{9-x-2y}{3}$

So, Volume becomes,

$V=xyz\\\\V=xy(\dfrac{9-x-2y}{3})\\\\V=\dfrac{9xy-x^2y-2xy^2}{3}$

Partially derivative wrt x and y we get that

$9-2x-2y=0\implies 2x+2y=9\\\\and\\\\9-x-4y=0\implies x+4y=9$

By solving these two equations, we get that

$x=3,y=\dfrac{3}{2}$

So, $z=\dfrac{9-x-2y}{3}=\dfrac{9-3-3}{3}=\dfrac{3}{3}=1$

So, Volume of largest rectangular box would be

$xyz=3\times \dfrac{3}{2}\times 1=\dfrac{9}{2}=4.5$

Hence, the volume of largest rectangular box is 4.5 units.

4 0

3 years ago

Which number line is it?

Allushta [10]

Answer is A. first one...

P = -3
G = 3

P = -G = -(3) = -3

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3 years ago

The diagram shows a part of a regular 10 sided polygon work out the size of the angle marked x

OverLord2011 [107]

Answer:

Step-by-step explanation:

7 0

3 years ago