geno3141

If  1 + 1  ≠  2  because you are working in the base two system  (where  1 + 1  = 10), then  1  still equals  1.

However, if you are working in the base ten system, then since your hypothesis ('let 1 + 1  ≠  2') is false, you can write anything for your conclusion. The statement may be complete nonsense, but the full statement won't be false. 

The area of a square is its length times its width:  l x w  =  361

Since the length of a square is the same as its width, replace 'w' with 'l':  l x l  =  361

     l x l  =  l²  =  361     --->   l  =  √361       --->   l  =  √361       --->     l  =  19 ft.

No; it doesn't.

Since an hour is 60 minutes,  .8  of an hour is  .8  of  60  minutes.

To solve, multiply  .8 x 60  =  48 minutes.

You would have to know the number of days that you worked; for example if the 30 days represented a full month and if you did not work Saturdays or Sundays, you probably would have worked only 22 days.

Also, you need to know how many hours per day that you worked.

To calculate hourly pay, you need to know the total number of dollars earned (in this case is $1200) and the total number of hours worked (which is unknown in this case).

(4/x + 2) + (1/x - 2)  =  (5x-6) / (x² - 4)

First, simplify the left side:  4/x + 1/x  =  5/x      and + 2 - 2 = 0.

If you factor  x² - 4 , you get:  (x + 2)(x - 2).

The denominaors have three terms:  x,  x + 2,  and  x - 2.  Since denominators are not allowed to be zero, the numers  0, -2,  and  +2  cannot be answers.

5/x  =  (5x-6) / (x² - 4)

Cross multiply:

5(x² - 4)  =  x(5x-6)

Multiply out:

5x² - 20  =  5x² - 6 x

-20  =  -6x

x  =  10/3

Work from the innermost set of parentheses outward:

- ( 3 - 5 ) - [ 2 - ( 3^2 - 13 ) ] 

- ( 3 - 5 ) - [ 2 - ( 9 - 13 ) ] 

- ( 3 - 5 ) - [ 2 - ( - 4 ) ] 

- ( 3 - 5 ) - [ 2 + 4 ] 

- ( -2 ) - ( 6 )

2 - 6

-4

You have two denominators,  14  and  28;  find a common denominator for them and multiply both sides by this number; then, there will be no more fractions.  So, multiply both sides by 28:

     28 · (5x/14)  =  28 · (5/28)

     Since 28 · 5 / 14  =  10      and     28 · 5 / 28  =  5

--->    10x  =  5           (Now, divide both sides by 10.)

--->   x  =  0.5

If the set of data has one or more outliers that drastically affects the value of the average, using the median is the better description of the average.

As the set gets larger the mean and the median converge to the same value.

There are some statistical tests that require that you use the mean.

So, my answer is -- "It depends." 

To find percent, divide the part by the whole amount and then multiply that answer by 100:

2 000 / 70 000 000   ≈   0.000 028 571 

Multiply  0.000 028 571  by 100     ===>   0.003 %