Explain why social security number is considered a qualitative variable even though it contains numbers.

Explanation:

Being numbers doesnt mean that the variable is quantitative. Those numbers need to have some meaning other than a mere identification.

There should be a relation on elements with similar numbers and the number ordering should mean something: if i have a higher number of centimeters than you, then i am taller, otherwise i am smaller. If a i have 4 pencils and you have 8, then you have the double amount of pencils than me.

In the case of social security number there is no meaning on having a greater number other than being a different number, there is no meaning if, for example, my number is twice as big as yours. The only importance of this numbers is to identify the people, they could have used letters instead, thats why it is a qualitative variable instead of a quantitative one.

step-by-step explanation:

descending order means to order the polynomials from the term with the largest exponent to the term with the smallest exponent.  

therefore, the correct answer is d.  

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺