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2(3x+2)-4(x-7)=8(2x-3)

6x+4 - 4x+28=16x-24

2x+32=16x-24

2x+56=16x

56=14x

x=4

Some math nerd named Mr. Multiplication made it up so kids at school would suffer

JK

It was invented by the Babylonians thousands of years ago

Multiplication came from many different places, and each place has its own special way of solving a multiplication problem.

There is none you just type it in the box

You find the square root of that number.

EX:

The square root of 9 is equal to 3, since (3)(3) is equal to 9.

The square root of 25 is equal to 5, since (5)(5) is equal to 25.

The square root of 100 is equal to 10, since (10)(10) is equal to 100.

I said IF YOUR REFFERING TO THAT VIDEO 21!!! But otherwise i say 19

multiply it by 0.5 or divide it by 2

Ex:

64x0.5=32

64/2=32

2/4=1/2

Because both 2 and 4 are divisible by 2, it simplifies to 1/2.

6/8=3/4

Since 2 is both the 6 and the 8's least common factor, it simplifies to 3/4.

Other examples:

7/21=1/3

10/30=2/6

9/99=1/11

30/80=3/8

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Other times, you cannot simplify the fraction because it is already at its lowest that it can go.

EX:

3/5

6/9

1/4

11/23

If your problem looks like this:  3  <  2x + 6  < 18

Get the variable term alone in the center section by doing the same thing to all three parts.

First, get rid of the 6, by subtracting 6 from all three parts:

                  3 - 6  <  2x + 6 - 6  <  18 - 6

                        -3  <  2x  <  12

Now, divide all three parts by 2:

                     -3 ÷ 2  <  2x ÷ 2  <  12 ÷ 2

                        -1.5  <  x  <  6

For a rectangle:  Area  =  length x width   --->   A  =  l·w    or    l·w  =  A

--->   l·w  =  1/7

Now, to solve for l, divide both sides by w:

--->   l·w ÷ w  =  1/7 ÷ w

--->  l  =  1/7 ÷ w

Umm...

Take this equation for ex: 1k-4<2k-4

1k-4<2k-6

1k-4+4<2k-6+4

1k<2k-2

1k+2<2k-2+2

1k+2<2k

1k+2-1k<2k-1k

2<k

I hope this helped... sorry i couldn't go in depth

Using the formula:  d  =  ½at² + v₀t

--->                    290  =  ½(-3.90)(12)² + v₀(12)

--->                   290  =  -280.8 + 12v₀  

--->                570.8  =  12v₀ 

--->                 47.6 m/s                        

(394920)(394920)(394920)(394920)(394920)(394920)(394920)(394920)(394920)=233658807057821781483482548087001478070272000000000

Just multiply 394920 by itself 9 times.

n<4 2/3

To tell the difference between a relationship that is a function and one that isn't:

In a function, each x-value has only one y-value paired with it.

For instance,  y = x² is a function because any x-value that you choose has only one y-value paired with it:

           when  x = 2, y = 4         when x = -2, y = 4       when x = 0, y = 0      when x = 12, y = 144    etc.

    as points, these are:  (2, 4)                (-2, 4)                         (0, 0)                      (12, 144)    

           (using the same y-value twice is OK).

But  y²  =  x  is not a function because 

           when  x = 4, y can be either 2 or -2      

     as points, these are  (4,2)    (4, -2)            (using the same x-value twice isn't OK).

To find one-half of the sum, let's add them together and then divide by 2:

(n + 1) + (n + 2)  =  n + 1 + n + 2  

Dividing by 2,  (n + 1 + n + 2) / 2

What about fractions?        (.5)²  =  .25              (.5)³  =  .125

What about negatives?       (-2)²  =  4                (-2)³  =  -8              (-2)⁴  =  16

What about 0?                   (0)²  =  0                 (0)³  =  0

What about 1?                   (1)²  =  1                 (1)³  =  1

What about -1?                 (-1)²  =  1                (-1)³  =  -1              (-1)⁴  =  1

What do you think about Eliza's observation?

Formula for slope:  m  =  (y2 - y1)/(x2 - x1)

For this problem,  m = 7,  x1 =6,  y1 = 2a,  x2 = a,  and  y2 = -2:

--->  7  =  (-2 - 2a)/(a - 6)

--->  7(a - 6)  =  (-2 -2a)                                (multiply both sides by a-6)

--->  7a - 42  =  -2 - 2a                                  (simplify)

--->  9a - 42  =  -2                                         (add 2a to both sides)

--->  9a  =  40                                               (add 42 to both sides)

--->  a  =  40/9                                              (divide both sides by 9)

Does 196π represent the circumference of a circle?

If so:  C = 2πr

--->   196π  =  2πr                          (Now, divide both sides by 2π:

--->   196π / (2π)  =  2πr / (2π)

--->   98  =  r

a common fraction is a fraction expressed by a numerator and a denominator and not decimally

Distance  =  speed x time

398 m  =  122 m/s x time                       (Now, divide both sides by 122:)

time  =  398 / 122 s

Density = mass/volume

0.857  =  74.5/v

0.857v  =  74.5                              (multiply both sides by v)

v  =  74.5/0.857                             (divide both sides by 0.857)

When you finish that division, you will have the volume...

What do you mean by " 1/2 2x squared plus 2x"?

Is it ½(2x)² + 2x  =  20  

or is it  ½[(2x)² + 2x]  =  20  

or is it something else?

If the equation of a line is solved for y, it is in slope-intercept form:  y  =  mx + b, 

where  m  represents the slope and  b  represents the -intercept.

So the equation  y  =  -3/2x + 4  determines a line whose slope is  -3/2  and whose y-intercept is  4.