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8_murik_8 [283]
3 years ago
15

I don’t know how to do this math problem

Mathematics
2 answers:
Kruka [31]3 years ago
7 0

Answer: 8

Step-by-step explanation: just do it like this:

1+1+1+1+1+1+1+1

Svetach [21]3 years ago
3 0

Answer:

I'll help

Step-by-step explanation:

No worries man

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An open metal tank of square base has a volume of 123 m^3
snow_lady [41]

Answer:

  a) h = 123/x^2

  b) S = x^2 +492/x

  c) x ≈ 6.27

  d) S'' = 6; area is a minimum (Y)

  e) Amin ≈ 117.78 m²

Step-by-step explanation:

a) The volume is given by ...

  V = Bh

where B is the area of the base, x^2, and h is the height. Filling in the given volume, and solving for the height, we get:

  123 = x^2·h

  h = 123/x^2

__

b) The surface area is the sum of the area of the base (x^2) and the lateral area, which is the product of the height and the perimeter of the base.

S=x^2+Ph=x^2+(4x)\dfrac{123}{x^2}\\\\S=x^2+\dfrac{492}{x}

__

c) The derivative of the area with respect to x is ...

S'=2x-\dfrac{492}{x^2}

When this is zero, area is at an extreme.

0=2x -\dfrac{492}{x^2}\\\\0=x^3-246\\\\x=\sqrt[3]{246}\approx 6.26583

__

d) The second derivative is ...

S''=2+\dfrac{2\cdot 492}{x^3}=2+\dfrac{2\cdot 492}{246}=6

This is positive, so the value of x found represents a minimum of the area function.

__

e) The minimum area is ...

S=x^2+\dfrac{2\cdot 246}{x}=(246^{\frac{1}{3}})^2+2\dfrac{246}{246^{\frac{1}{3}}}=3\cdot 246^{\frac{2}{3}}\approx 117.78

The minimum area of metal used is about 117.78 m².

3 0
2 years ago
HEY YOU, YEAH YOU<br> I REALLY NEED HELP<br> okay so -5/16 + 9/8
pogonyaev

-5/16 + 18/16 13/16 - answer

8 0
3 years ago
Read 2 more answers
Amy and Mary are playing a board game that uses game money if $5 and $10. At the end of the game, Amy has n bills worth $5 each
loris [4]

Answer:

5n + 10d represented the money spend by the Amy in playing board games  of cost $5 and $10 .

Step-by-step explanation:

As given

Amy and Mary are playing a board game that uses game money if $5 and $10.

At the end of the game, Amy has n bills worth $5 each and d bills worth $10 each .

Total amount of n bills = 5n

Total amount of  d bills = 10d

Thus

Total money spend by the Amy in playing board games = Total amount of n bills + Total amount of  d bills

                                                                                             = 5n + 10d

Therefore  5n + 10d represented the money spend by the Amy in playing board games  of cost $5 and $10 .

6 0
3 years ago
Solve for x<br> -18 = 9 - 3x
iVinArrow [24]

Answer:

3x=9+18

=27

x =27÷3

x=9

the answer of x is 9

6 0
2 years ago
Read 2 more answers
Simplify this expression.<br> 2x/12(x + y)
Ymorist [56]

Answer: = 1 /6 x^2+ 1 /6 xy

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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