All categories

2 years ago

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Mathematics

1 answer:

Nonamiya [84]2 years ago

7 0

Answer:

a x=-2

Step-by-step explanation:

2(x-4) = 4(2x + 1)

Distribute

2x-8 = 8x +4

Subtract 2x from each side

2x-2x-8 = 8x-2x +4

-8 = 6x+4

Subtract 4 from each side

-8-4 = 6x+4-4

-12 = 6x

Divide by 6

-12/6 = 6x/6

-2 =x

You might be interested in

If the cylinder above is similar to a second cylinder that has a radius of 10mm, what is the height of the second cylinder

julsineya [31]

Answer:

The height of the second cylinder is 30mm

Step-by-step explanation:

Given

Cylinder 1:

$R = 15mm$

$H = 45mm$

Cylinder 2

$r = 10mm$

See attachment

Required

Determine h, the height of the small one

To do this, we make use of the following equivalent ratios;

$R : H = r : h$

This gives:

$15 : 45 = 10 : h$

Express as fraction

$\frac{15 }{ 45 }= \frac{10 }{ h}$

Simplify

$\frac{1 }{ 3}= \frac{10 }{ h}$

Cross multiply

$h *1 = 3 * 10$

$h = 30$

8 0

2 years ago

Which equation has a graph with a vertex at (-1,-1)?

11111nata11111 [884]

$y = {(x + 1)}^{2} - 1$

The one is a vertical translation of the parent function to the left of one

$f(x) = {x}^{2}$

making it -1.

6 0

3 years ago

Mmmmm help HELPPPPP,,,,,,

Aleks [24]

Answer:

I guess it's 63degrees

I hope it will help

4 0

2 years ago

On a recent quiz, the class mean was 72 with a standard deviation of 4.2. Calculate the z-score (to 2 decimal places) for a pers

barxatty [35]

Answer:

The Z score of the person is -3.09.

Step-by-step explanation:

The standard normal deviate (Z) for a normal distribution is given by

$Z=\frac{X-\bar{X}}{\sigma }$

where,

X = the value of observation

$\bar{X}$ is mean of the observations and

σ = standard deviation of the score

Applying values we get

$Z=\frac{59-72}{4.2}=-3.09$

5 0

3 years ago

What is the sum of the areas of circle C and circle D?

Galina-37 [17]

141 units is the answer.

8 0

3 years ago