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riadik2000 [5.3K]
3 years ago
8

What is the answer and how would I solve this?

Mathematics
1 answer:
Firlakuza [10]3 years ago
5 0

Answer:

the answer is D

Step-by-step explanation:

3(x-1)\geq 12

3x-3 >= 12

3x>=15

x>=5

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Giải phương trình vi phân<br> a. dy/dx<br> b. y' + 2xy = 4x
WITCHER [35]

Your first differential equation is incomplete, so I'll just look at the second one.

<em>y'</em> + 2<em>xy</em> = 4<em>x</em>

Multiply both sides by exp(<em>x</em> ²):

exp(<em>x</em> ²) <em>y'</em> + 2<em>x</em> exp(<em>x</em> ²) <em>y</em> = 4<em>x</em> exp(<em>x</em> ²)

The left side is the derivative of a product:

(exp(<em>x</em> ²) <em>y</em> )<em>'</em> = 4<em>x</em> exp(<em>x</em> ²)

Integrate both sides:

exp(<em>x</em> ²) <em>y</em> = ∫ 4<em>x</em> exp(<em>x</em> ²) d<em>x</em>

For the integral, substitute <em>u</em> = <em>x</em> ² and d<em>u</em> = 2<em>x</em> d<em>x</em> :

exp(<em>x</em> ²) <em>y</em> = 2 ∫ exp(<em>u</em>) d<em>u</em>

Solve for <em>y</em> :

exp(<em>x</em> ²) <em>y</em> = 2 exp(<em>u</em>) + <em>C</em>

exp(<em>x</em> ²) <em>y</em> = 2 exp(<em>x</em> ²) + <em>C</em>

<em>y</em> = 2 + <em>C</em> exp(-<em>x</em> ²)

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3 years ago
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Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please may someone help with c
german

Step-by-step explanation:

Distance between two villages = d

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4 years ago
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Answer:

Please find attached the graph of the given data created with Microsoft Excel

Step-by-step explanation:

The question is a word problem with which we construct a table of values and then graph the data as follows;

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The graph of the above data in created using the Chart options in the Insert menu of Microsoft Excel as seen in the attached image

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Answer:

There is a whole range of speeds at which you are allowed to drive, not just one. In cases like this where there is more than one correct answer, we use inequalities, not equations, to represent the situation.

Inequalities are mathematical statements that define a range of values. They are easily recognizable because they contain the symbols <, ≤,>, or ≥.

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