Fa in the blanks we are collecting sample data for w hy the methods to analyzed in voluntary ros that we choose a greatly influence the validity of our conclusions for came, we can use sound e s but there were vald w we are collegame for the sound c l methods to analyse data in voluntary responses the are a ah

kk.bj.

step-by-step explanation:

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answer. d.289 hope that

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 -

answer: (1,3) (3,-1) (5,-5) ?

step-by-step explanation: