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2 years ago

I don't get this at all

Mathematics

1 answer:

dezoksy [38]2 years ago

6 0

Answer:

-5=n

Step-by-step explanation:

75=3(-6n-5)

Distribute the 3

75=-18n-15

Add 15 to both sides

90=-18n

Divide both sides by -18 to get n alone

-5=n

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Here is an inequality: 7x+6/2 < 3x +2

Archy [21]

Answer:

x=1

Step-by-step explanation:

7 0

2 years ago

A(n) ______ line is a line that relates points on the line with numbers.

Oliga [24]

ans: number line

Step-by-step explanation:

the ans is number

7 0

2 years ago

In problem solve the given differential equation by underdetermined coefficients y''-2y+y=xe^x

Alexus [3.1K]

Answer:

Solution is $y(t)=C_1e^x+C_2xe^x+\frac{x^3e^x}{6}$

Step-by-step explanation:

Given Differential Equation,

$y"-2y'+y=xe^x$ ...............(1)

We need to solve the given differential equations using undetermined coefficients.

Let the solution of the given differential equation is made up of two parts. one complimentary solution and one is particular solution.

$\implies\:y(x)=y_c(x)+y_p(x)$

For Complimentary solution,

Auxiliary equation is as follows

m² - 2m + 1 = 0

( m - 1 )² = 0

m = 1 , 1

So,

$y_c(x)=C_1e^x+c_2xe^x$

Now for particular solution,

let $y_p(x)=Ax^3e^x$

$y'=Ax^3e^x+3Ax^2e^x$

$y"=Ax^3e^x+6Ax^2e^x+6Axe^x$

Now putting these values in (1), we get

$Ax^3e^x+6Ae^2e^x+6Axe^x-2(Ax^3e^x+3Ax^2e^x)+Ax^3e^x=xe^x$

$Ax^3e^x+6Ae^2e^x+6Axe^x-2Ax^3e^x-6Ax^2e^x+Ax^3e^x=xe^x$

$6Axe^x=xe^x$

$6A=1$

$A=\frac{1}{6}$

$\implies\:y_p(x)=\frac{x^3e^x}{6}$

Therefore, Solution is $y(t)=C_1e^x+C_2xe^x+\frac{x^3e^x}{6}$

8 0

2 years ago

2- 5x=-13 how do u solve this

kenny6666 [7]

2 - 5x = -13
-2 -2
---------------
-5x = -15
/-5 /-5
-------------
x = 3

Hope this helps!

6 0

2 years ago

1. In AFKR, which side is included between

Igoryamba

Answer:

(B.)k

Step-by-step explanation:

in between F and R is K.

4 0

2 years ago

I don't get this at all​

I don't get this at all