All categories

3 years ago

(4x + 18) value of X

Mathematics

1 answer:

liubo4ka [24]3 years ago

3 0

Answer:

x = (-9)/2 or decimal x = -4.5

Step-by-step explanation:

Solve for x:

4 x + 18 = 0

Subtract 18 from both sides:

4 x + (18 - 18) = -18

18 - 18 = 0:

4 x = -18

Divide both sides of 4 x = -18 by 4:

(4 x)/4 = (-18)/4

4/4 = 1:

x = (-18)/4

The gcd of 18 and 4 is 2, so (-18)/4 = (-(2×9))/(2×2) = 2/2×(-9)/2 = (-9)/2:

Answer: x = (-9)/2

You might be interested in

What is the equation of a line that is parallel to −3x+4y=4 and passes through the point (4, 0) ?

Degger [83]

First, change the given equation to slope-intercept form:

4y = 3x + 4
y = (3/4)x + 1

Because the line we are trying to write the equation for is parallel to the above line, the new line must have the same slope (3/4).

We can then substitute (4, 0) to find the y-intercept (b):

0 = (3/4) * 4 + b
0 = 3 + b
-3 = b

Our y-intercept is -3

We can now write the whole equation:

y = (3/4)x - 3

Your final answer is y = (3/4)x - 3

Hope this helps!! Let me know if you have ANY questions.

3 0

3 years ago

IF YOU KNOW THE ANSWER PLSSS HELP

Nookie1986 [14]

I dont know sorry :(

7 0

3 years ago

Read 2 more answers

2+x=15-7/8x how do you solve this?

uranmaximum [27]

Answer:2+x=15-7/8x

We move all terms to the left:

2+x-(15-7/8x)=0

Domain of the equation: 8x)!=0

x!=0/1

x!=0

x∈R

We add all the numbers together, and all the variables

x-(-7/8x+15)+2=0

We get rid of parentheses

x+7/8x-15+2=0

We multiply all the terms by the denominator

x*8x-15*8x+2*8x+7=0

Wy multiply elements

8x^2-120x+16x+7=0

We add all the numbers together, and all the variables

8x^2-104x+7=0

a = 8; b = -104; c = +7;

Δ = b2-4ac

Δ = -1042-4·8·7

Δ = 10592

The delta value is higher than zero, so the equation has two solutions

We use following formulas to calculate our solutions:

x1=−b−Δ√2ax2=−b+Δ√2a

The end solution:

Δ−−√=10592−−−−−√=16∗662−−−−−−−√=16−−√∗662−−−√=4662−−−√

x1=−b−Δ√2a=−(−104)−4662√2∗8=104−4662√16

x2=−b+Δ√2a=−(−104)+4662√2∗8=104+4662√16

Step-by-step explanation:

5 0

3 years ago

2x-3y=-1<br> 3x-4y=-1<br> giải hpt

bonufazy [111]

Answer:

x = 1

Y = 1

Step-by-step explanation:

A. 3(2x-3y= - 1)

6x-9y=- 3

B. -2(3x-4y= - 1)

- 6x+8y=2

Add both equations:

(6x-9y= - 3) + (- 6x+8y=2)

-y= - 1

3x - 4(1) = - 1

3x-4= - 1

3x = 4 - 1

= 3/3 = 1

8 0

3 years ago

The green triangle is a dilation of the red triangle with a scale factor of s=13 and the center of dilation is at the point (4,2

Arada [10]

Given:

Scale factor $s=\dfrac{1}{3}$

Center of dilation = (4,2)

To find:

The coordinates of the points C' and A.

Solution:

We know that, if a figure is dilated with a scale factor k and the center of dilation is at the point (a,b), then

$(x,y)\to (k(x-a)+a,k(y-b)+b)$

The scale factor is $\dfrac{1}{3}$ and the center of dilation is at (4,2).

$(x,y)\to (\dfrac{1}{3}(x-4)+4,\dfrac{1}{3}(y-2)+2)$ ...(i)

Suppose the vertices of red triangle are A(m,n), B(10,14) and C(-2,11).

Using rule (i), we get

$C(-2,11)\to C'(\dfrac{1}{3}(-2-4)+4,\dfrac{1}{3}(11-2)+2)$

$C(-2,11)\to C'(\dfrac{1}{3}(-6)+4,\dfrac{1}{3}(9)+2)$

$C(-2,11)\to C'(-2+4,3+2)$

$C(-2,11)\to C'(2,5)$

Hence, the coordinates of Point C' are C'(2,5).

Let us assume that point A is A(m,n).

Using rule (i), we get

$A(m,n)\to A'(\dfrac{1}{3}(m-4)+4,\dfrac{1}{3}(n-2)+2)$

From the given figure it is clear that the image of point A is (8,4).

$A'(\dfrac{1}{3}(m-4)+4,\dfrac{1}{3}(n-2)+2)=A'(8,4)$

On comparing both sides, we get

$\dfrac{1}{3}(m-4)+4=8$

$\dfrac{1}{3}(m-4)=8-4$

$(m-4)=3(4)$

$m=12+4$

$m=16$

And,

$\dfrac{1}{3}(n-2)+2=4$

$\dfrac{1}{3}(n-2)=4-2$

$(n-2)=3(2)$

$n=6+2$

$n=8$

Therefore, the coordinates of point A are (16,8).

4 0

3 years ago