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2 years ago

Please help!!!!!! Its due today!!!!

Mathematics

2 answers:

White raven [17]2 years ago

8 0

Answer:

(-3, -1) (-2, 3)

(-2, 3) (-2, 3)

Step-by-step explanation:

Svetach [21]2 years ago

4 0

Answer:

I think this is your answer _. 4 ×( _ 2°3)

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Use the graph below to find f(-2) =

Vedmedyk [2.9K]

F(-2) is when x = -2
On the graph it’s (-2, 2)
Solution: f(-2) = 2

7 0

2 years ago

Set up but do not solve for the appropriate particular solution yp for the differential equation y′′+4y=5xcos(2x) using the Meth

taurus [48]

Answer:

So, solution of the differential equation is

$y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

Step-by-step explanation:

We have the given differential equation: y′′+4y=5xcos(2x)

We use the Method of Undetermined Coefficients.

We first solve the homogeneous differential equation y′′+4y=0.

$y''+4y=0\\\\r^2+4=0\\\\r=\pm2i\\\\$

It is a homogeneous solution:

$y_h(t)=c_1e^{-2i t}+c_2e^{2i t}$

Now, we finding a particular solution.

$y_p(t)=A5x\cos 2x\\\\y'_p(t)=A5\cos 2x-A10x\sin 2x\\\\y''_p(t)=-A20\sin 2x-A20x\cos 2x\\\\\\\implies y''+4y=5x\cos 2x\\\\-A20\sin 2x-A20x\cos 2x+4\cdot A5x\cos 2x=5x\cos 2x\\\\-A20\sin 2x=5x\cos 2x\\\\A=-\frac{x}{4} \cot 2x\\$

we get

$y_p(t)=A5\cos 2x\\\\y_p(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x\\\\\\y(t)=y_p(t)+y_h(t)\\\\y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

So, solution of the differential equation is

$y(t)=-\frac{5x^2}{4}\cot 2x\cdot \cos 2x+c_1e^{-2it}+c_2e^{2it}\\$

7 0

2 years ago

-2=-(n-8) what would be the answer

Alexeev081 [22]

Answer:

n=10

Step-by-step explanation:

-2=-n+8

-n=-10

n=10

3 0

2 years ago

You get tired of the sand and head up to the amusement park. You can purchase 20 ride tickets for $14 or you can purchase 30 rid

Helga [31]

Answer:

The one with the better deal would be 30 ride tickets for $22.50 this is because you pay less money for more rides.

Step-by-step explanation:

First you divide 20 by 14. Doing this will give you the cost of a ride per ticket.

20/14 = 1.42

Then you do the same thing to 30 and 22.50.

30/22.50 = 1.30

Last you compare which deal has less money per ride.

1.42 > 1.30

5 0

3 years ago

Add 5x+4y;3x-7y;-4x+8y

viktelen [127]

The answer is 4x + 5y.

Here, what needs to be done is to combine like terms.

5x + 4y + 3x - 7y - 4x + 8y
5x + 3x - 4x + 4y + 8y - 7y
4x + 5y

4 0

1 year ago