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2 years ago

Solve for X: 3х + 4 = 9x + 3

Mathematics

2 answers:

AleksandrR [38]2 years ago

7 0

Answer:

x=1/6

Step-by-step explanation:

The steps are in the picture below

vfiekz [6]2 years ago

7 0

Answer:

Step-by-step explanation:

here you go mate

step 1

3х + 4 = 9x + 3 equation

step 2

3х + 4 = 9x + 3 simplify

-6x+4=3

step 3

−6x+4=3 subtract 4 from both sides

−6x+4(-4)=3(-4)

-6x=-1

step 4

$\frac{-6x}{-6} =\frac{-1}{-6}$ divide both sides

answer

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

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A homogeneous second-order linear differential equation, two functions y1 and y2 , and a pair of initial conditions are given be

Basile [38]

Answer:

Step-by-step explanation:

Check part

$y= C_1y_1 + C_2y_2 = C_1cos(7x)+C_2sin(7x)$

$y'= -7 C_1sin(7x)+7C_2cos(7x)$

$y"= -49 C_1cos(7x) - 49 C_2sin(7x)$

Now, replace to the original one.

$y"+49 y = -49C_1cos(7x)-49 C_2 sin(7x) + 49 C_1cos(7x) +49 C_2sin(7x) = 0\\$

Done!!

Particular solution

$y(0) = C_1cos(0) + C_2 sin(0) = C_1= 10$

I believe that y'(0) = 4, not y(0) anymore. Since y(0) CANNOT have two different solution.

$y(0)'= -7 C_1sin(0) + 7 C_2 cos (0) = 7 C_2= -4$

$C_2 = -4/7$

The last step is to put C1, C2 into your solution. You finish it.

4 0

3 years ago

X^2 - 8x = 3 by completing the square

Anit [1.1K]

<h2>Solving Quadratic Equations by Completing the Square Method</h2><h3>Answer:</h3>

$x = 4 +\sqrt{19}$ and $x = 4 -\sqrt{19}$

<h3>Step-by-step explanation:</h3>

Recall:

$x^2 -2ax +a^2 = (x -a)^2$

$x^2 -8x = 3 \\ x^2 -8x +16 = 3 +16 \\ (x -4)^2 = 19 \\ x -4 = ±\sqrt{19} \\ x = 4 ±\sqrt{19}$

3 0

2 years ago

Answer the following questions: 2/3 is what percent of 1/4?

Zolol [24]

Answer:

1/2 or 0.5

Step-by-step explanation:

To find out what 2/3 is out of 3/4, we just have to multiply them together to get our exact answer.

$\frac{2}{3} *\frac{3}{4}=\frac{6}{12}=\frac{1}{2}$

Our final answer is 1/2 or 0.5.

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3 years ago

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lara31 [8.8K]

Answer:

Step-by-step explanation:

no. of Classes = x

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220×x = 220x

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5 0

2 years ago

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Simplify each expression 8x+13-3x+9

igor_vitrenko [27]

Answer:

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Step-by-step explanation:

8x-3x = 5x

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Remember sign stays with the number

6 0

2 years ago

Solve for X: 3х + 4 = 9x + 3 ​

Solve for X: 3х + 4 = 9x + 3