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maria [59]
3 years ago
6

If x = 3 and y = 8 , evaluate the following expression: y − x

Mathematics
2 answers:
kotykmax [81]3 years ago
6 0

Answer:

=5

Step-by-step explanation:

if x=3 and y =8 then you will have to do 8-3 which is 5

i hope this helps

VARVARA [1.3K]3 years ago
5 0

Answer:

5

Step-by-step explanation:

y-x

8-5 = 5

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A rectangular storage container with an open top is to have a volume of 24 cubic meters. The length of its base is twice the wid
Mariana [72]

Answer:

419.25

Step-by-step explanation:

The calculation of the cost of materials for the cheapest such container is shown below:-

We assume

Width = x

Length = 2x

Height = h

where, length = 2 \times width

Base area = lb

= 2x^2

Side area = 2lh + 2bh

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= 4xh + 2xh

Volume = 24 which is lbh = 24

h = \frac{24}{2x^2} \\\\ h = \frac{12}{x^2}

Now, cost is

= 13(2x^2) + 9(4xh + 2xh)\\\\ = 13(2x^2) + 9(4x + 2x)\times \frac{12}{x^2} \\\\ = 26x^2 + \frac{648}{x}

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So, we need to compute the C'(x)

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now for the critical points, we will solve the equation C'(x) = 0

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C" = ((\frac{648}{52} ^{\frac{1}{3} } = 52 + \frac{1296}{(\frac{648}{52})^\frac{1}{3} )^3}\\\\ = 52 + \frac{1296}{\frac{648}{52} } >0

So, x is a point of minima that is

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Now, Base material cost is

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= 139.75

Side material cost is

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= 279.50

and finally

Total cost is

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Nataly_w [17]

Answer:

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Step-by-step explanation:

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