The ages of some lecturers are 42,54,50,42,46,46,48 and 48 calculate the standard deviation

3.74

Step-by-step explanation:

The standard deviation for this question is 3.74. I found this by going to an online graphing calculator, I use GeoGebra Graphing Calculator and insert the numbers. Before you type them though, you have to put SD (this stands for standard deviation, and yes it MUST be capitalized.) Then insert the points into a set of parentheses and press enter. Like so:

SD(42, 54, 50, 42, 46, 46, 48, 48) = 3.74165

Usually, your instructor will only want you to round two decimal places so the rest of the deviation is not needed or important unless you have to round up.

I hope this helped. :)

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29