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2 years ago

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Mathematics

1 answer:

KIM [24]2 years ago

3 0

Answer:

third and fifth

Step-by-step explanation:

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Rohan and Amit can build a tank in 12 days while Amit and Sohan in 15 days and Rohan and Sohan in 20 days. How long would each t

kolezko [41]

Answer:

Rohan-6

amit-6

sohan-9

Step-by-step explanation:

12/2=6 rohan And amit

amit=6 so solan has to take 9

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2 years ago

What 3x4x5x6+7= <br> single numbers

Lana71 [14]

Answer:

367

Step-by-step explanation:

because of PEMDAS, 3, 4, 5, and 6 have to be multiplied together, then 7 can be added later.

$(3*4*5*6)=360\\\\360+7=367$

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2 years ago

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Evaluate the following expression when x = 3 and y = 4:

JulijaS [17]

I don't understand. What are the values given? Are they values of an x,y plot?
If you plot them they are a straight line with y =6x - 2.9 but I don't know what you mean by when x=3 and y = 4?

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3 years ago

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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Fill in the missing number to complete the pattern 145, 148, 151, _ _ _ I REALLY NEED THIS PLZ

Savatey [412]

Answer:

154 157 160

Step-by-step explanation:

Add 3 each time

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3 years ago