The chancellor wants to change the lunch menu at the middle schools in New York City. The chancellor surveys the students to determine how the students would feel about the changes. Which survey method will produce the best representative.

the square root of what number? if you add that, then someone will probably answer the question.

probably .5

i can on others if necessary.

the answer is a if my teacher taught me correct

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 -