Sample: [34, 36, 39, 43, 51, 53, 62, 63, 73, 79]   N=10   Sum=533   Mean=533/10=53.3   Standard deviation=15.65   Standard Error= SE = standard deviation / sqrt( n )=15.65/square root of 10= 15.65/3.16=4.95   Critical...

The standard normal distribution is also called the bell curve because of its shape. The idea is that you have the mean (which has a Z value of 0) and then three standard deviations to the right of the mean and three to the left. It looks like this:   http://www.regentsprep.org/Regents/math/algtrig/ATS2/normal67...

Stem and leaf plots can be used in academic journals and publications. A newspaper like the Times probably wouldn't do it because their readers may not understand.

If we assume that Nataliya is right and the question is (4x - 12) / (x2 + 4x - 21) We can simplify it like so (2x-3.46)/(x+2x-4.58): This takes the square root of your original equation

Hi Zak,   I'm going to give you an example of stem-and leaf plotting. Suppose that you have a data set that's as follows: x={1, 2, 4, 5, 11, 15, 19, 20} The stem (left side), is the first digit of the data. The leaf (right side) is the second digit. So plotting the above...

8x+6=4x+26 First, you want to get all the variables you are trying to solve for on one side  so subtract 4x from both side 8x+6=4x+26 -4x      -4x That leaves you with 4x+6=26 (because 4x-4x=0 so that term is eliminated) Next,...

Chris is right: Let's say x=10. Then we can plug in the numbers   1/10+1/9/1 times 10 squared minus 1/3   0.10+0.11/100 minus 0.33 0.10+0.001-0.33 0.1001-0.33

This is difficult to answer without knowing the type of object but assume its a rectangle.   16 inches=area around the rectangle=sum of all four sides; for example if the length was 5 inches and the width was 3 inches, the area would be 5+3+5+3=16 The area would be the...

x2 - x - 12 = 0 First, you add 12 to both sides x2 - x = 12 Then you add x to both sides X2=12+x Then you fill in the blanks. Let's try 4 4 squared=16=12+4 Therefore x equals 4. Let's check this. x2 - x - 12 = 0 4squared-4-12=0 16-4-12=0 It...