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3 years ago

Help help help help help pls pls

Mathematics

2 answers:

salantis [7]3 years ago

8 0

Answer:

Step-by-step explanation:

nataly862011 [7]3 years ago

5 0

Answer:

Can i get brainliest plz? if not it ok :)

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Which number makes the statement true 12:30 = x:50 A) 30 B) 32 C) 35 D) 41

lora16 [44]

Answer:

i think options are incorrect

x is 20 here

you can verify by putting value

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2 years ago

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Solve y'' + 10y' + 25y = 0, y(0) = -2, y'(0) = 11 y(t) = Preview

svetlana [45]

Answer: The required solution is

$y=(-2+t)e^{-5t}.$

Step-by-step explanation: We are given to solve the following differential equation :

$y^{\prime\prime}+10y^\prime+25y=0,~~~~~~~y(0)=-2,~~y^\prime(0)=11~~~~~~~~~~~~~~~~~~~~~~~~(i)$

Let us consider that

$y=e^{mt}$ be an auxiliary solution of equation (i).

Then, we have

$y^prime=me^{mt},~~~~~y^{\prime\prime}=m^2e^{mt}.$

Substituting these values in equation (i), we get

$m^2e^{mt}+10me^{mt}+25e^{mt}=0\\\\\Rightarrow (m^2+10y+25)e^{mt}=0\\\\\Rightarrow m^2+10m+25=0~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~[\textup{since }e^{mt}\neq0]\\\\\Rightarrow m^2+2\times m\times5+5^2=0\\\\\Rightarrow (m+5)^2=0\\\\\Rightarrow m=-5,-5.$

So, the general solution of the given equation is

$y(t)=(A+Bt)e^{-5t}.$

Differentiating with respect to t, we get

$y^\prime(t)=-5e^{-5t}(A+Bt)+Be^{-5t}.$

According to the given conditions, we have

$y(0)=-2\\\\\Rightarrow A=-2$

and

$y^\prime(0)=11\\\\\Rightarrow -5(A+B\times0)+B=11\\\\\Rightarrow -5A+B=11\\\\\Rightarrow (-5)\times(-2)+B=11\\\\\Rightarrow 10+B=11\\\\\Rightarrow B=11-10\\\\\Rightarrow B=1.$

Thus, the required solution is

$y(t)=(-2+1\times t)e^{-5t}\\\\\Rightarrow y(t)=(-2+t)e^{-5t}.$

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3 years ago

What is the value of 27÷(−34⋅−45)? 4 16/15 28 4/5 45

MakcuM [25]

Answer:

It would not be any of those answers. it would be 106 :) Its negative numbers divided

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2 years ago

Use a table of function values to approximate an x-value in which the exponential function exceeds the polynomial function. f(x)

olasank [31]

Use a table of function values to approximate an x-value in which the exponential function exceeds the polynomial function. f(x) = 3(4)(2x-4). h(x) = (x + 2)3 + 1.

D) x= 4

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3 years ago

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PLEASE HELP ILL GIVE BRAINLIEST Which set of ordered pairs represents a function?

jenyasd209 [6]

Answer:

the 2nd on (B)

Step-by-step explanation:

The x does not repeat

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3 years ago

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