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2 years ago

I need help again help me pllsssssss

Mathematics

2 answers:

notka56 [123]2 years ago

8 0

Answer: you end up at (2,2)

Step-by-step explanation:

daser333 [38]2 years ago

3 0

Answer:

2,2

Step-by-step explanation:

go down to the bottom right corner (5,-5)

move over left 3 boxes

and then up 7 boxes

hope this helps :P

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Use variation of parameters to find a general solution to the differential equation given that the functions y1 and y2 are linea

Aleks [24]

Recall that variation of parameters is used to solve second-order ODEs of the form

y''(t) + p(t) y'(t) + q(t) y(t) = f(t)

so the first thing you need to do is divide both sides of your equation by t :

y'' + (2t - 1)/t y' - 2/t y = 7t

You're looking for a solution of the form

$y=y_1u_1+y_2u_2$

where

$u_1(t)=\displaystyle-\int\frac{y_2(t)f(t)}{W(y_1,y_2)}\,\mathrm dt$

$u_2(t)=\displaystyle\int\frac{y_1(t)f(t)}{W(y_1,y_2)}\,\mathrm dt$

and W denotes the Wronskian determinant.

Compute the Wronskian:

$W(y_1,y_2) = W\left(2t-1,e^{-2t}\right) = \begin{vmatrix}2t-1&e^{-2t}\\2&-2e^{-2t}\end{vmatrix} = -4te^{-2t}$

Then

$u_1=\displaystyle-\int\frac{7te^{-2t}}{-4te^{-2t}}\,\mathrm dt=\frac74\int\mathrm dt = \frac74t$

$u_2=\displaystyle\int\frac{7t(2t-1)}{-4te^{-2t}}\,\mathrm dt=-\frac74\int(2t-1)e^{2t}\,\mathrm dt=-\frac74(t-1)e^{2t}$

The general solution to the ODE is

$y = C_1(2t-1) + C_2e^{-2t} + \dfrac74t(2t-1) - \dfrac74(t-1)e^{2t}e^{-2t}$

which simplifies somewhat to

$\boxed{y = C_1(2t-1) + C_2e^{-2t} + \dfrac74(2t^2-2t+1)}$

4 0

2 years ago

Two points -5.2 and 4.8 are on a number line. What is the distance, to the nearest tenth, between these two points?

Cerrena [4.2K]

-5.2 -4.8= -10 thats your answer and it easy math.

3 0

2 years ago

Suppose you earned 8t-3 on monday and 6t+5 dollars on tuesday. what were your total earnings? simplify your answer

Nadusha1986 [10]

Let
A=8t-3
B=6t+5

we know that
total earnings=A+B
so
total earnings=(8t-3)+(6t+5)------> (8t+6t)+(-3+5)------> (14t+2) dollars

the answer is
(14t+2) dollars

6 0

2 years ago

Zane way to color meatballs during a science class the blue ball weighs 7 lb in the green ball weighed 0.69 lb in the same place

Umnica [9.8K]

you would just add both of them together so the weight would be 7.69 Ibs

7 0

2 years ago

What is negative 6+positive 2 equal to

valkas [14]

Answer:

-4

Step-by-step explanation:

If you convert the words into an equation, you get:

-6+2

-6+2=-4

-4 is your answer.

~Stay golden~ :)

5 0

3 years ago

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