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2 years ago

10. (05.05 LC)

Mathematics

1 answer:

Mazyrski [523]2 years ago

5 0

Answer:

Step-by-step explanation:

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6/5? Could anyone help me I've been stuck on it for a while. 6 over 5 how do I didvide this and get a ratio?

lora16 [44]

Answer:

6/5 = 1.2 or 6:5

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2 years ago

Hey does anyone know if you wet your phone charger and you put it in rice for how log your supposed to keep it in their?

yawa3891 [41]

For a day at least. 24 to 36 hours

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3 years ago

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Match solutions and differential equations. Note: Each equation may have more than one solution. Select all that apply. (a) 7y''

Nonamiya [84]

Answer:

a- $e^x,e^{-x}$

b- $x^{-2}$

c- $x^3$

Step-by-step explanation:

a.7 y''-7 y =0

Auxillary equation

$D^2-1=0$

$(D-1)(D+1)=0$

D=1,-1

Then , the solution of given differential equation

$y=e^x,y=e^{-x}$

2. $7x^2y''+14xy'-14 y=0$

Y= $y=x^3$

$y=3x^2$

$y''=6x$

Substitute in the given differential equation

$42x^3+42x^3-14x^3\neq 0$

Hence, $x^3$ is not a solution of given differential equation

$e^x,e^{-x}$ are also not a solution of given differential equation.

y= $x^{-2}$

$y'=-2x^{-3}$

$y''=6x^{-4}$

Substitute the values in the differential equation

$7x^2(6x^{-4})+14x(-2x^{-3})-14 x^{-2}$

= $42x^{-2}-28x^{-2}-14x^{-2}=0$

Hence, $x^{-2}$ is a solution of given differential equation.

c. $7x^2y''-42y=0$

$y=x^3$

$y'=3x^2$

$y''=6x$

Substitute the values in the differential equation

$42x^3-42x^3=0$

Hence, $x^3$ is a solution of given differential equation.

a- $e^x,e^{-x}$

b- $x^{-2}$

c- $x^3$

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3 years ago

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John and Gary share a workload. At a certain point, John worked 2 more hours than Gary. The next day, John has worked 4 of Gary’

il63 [147K]

If these both men were working at normal hours, and then, (John) worked "2 more hours" than Gary has, this would just mean that he has worked more.

x+2= x+2.

Now if John has worked the double amount, 4 more times than Gary's usual hours, this would mean something quite different.

Then the expression would look like, (x+2×4x)

We don't know how many hours are the "usual hours", this is what "x" would then represent.

John has then worked (4×2+x) more hours than Gary.

Your answer: (4×2+x)

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2 years ago

Help plz help plz help plz help plz find value of b

zimovet [89]

Answer:

9. x = 16

10. x = 18

Step-by-step explanation:

9. 2x + 9 + 3x + 1 = 90

5x + 10 = 90

5x + 80

x = 16

10. 90 - 53 = 47

2x + 11 = 47

2x = 36

x = 18

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3 years ago

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