Khan Academy(#1): Identifying individuals, variables and categorical variables in a data set
1. When doing statistics, what is an individual:
2. When doing statistics, what is a variable?
3. When doing statistics, what is a categorical variable?
4. When doing statistics, what is a numerical variable?
5. When doing statistics, what is a data set?

answer: idk

step-by-step explanation:

he has now walked a total of what?

if i know what this is maybe i can

step-by-step explanation:

see explanation

step-by-step explanation:

a

(6r + 7) + (13 + 7r) ( remove brackets and collect like terms )

= 6r + 7 + 13 + 7r

= 13r + 20

b

remove brackets and collect like terms

13 - r - 1 + r

= 12 - r

c

remove brackets and collect like terms

= - 8 - r + 2r - 4

= - 12 + r

d

remove brackets and collect like terms

= 7r - - - 6r

[-   - = - - = - ]

= r -