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YariDelOrbeez115
02.06.2021 •
Mathematics
PLEASE HELP !
A researcher from a pet food manufacturer places multiple bowls of its several flavors of
dog food in a room with 20 dogs. The researcher records which foods the dogs eat.
Determine whether this describes a survey, an observational study, or an experiment
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Ответ:
Step-by-step explanation:
Fie distanța totală = x
Un călător parcurge un drum în trei zile
În prima zi merge o treime din drum și încă 15 km
= 1 / 3x + 15km
A doua zi călătorește două șapte din restul
= 2 / 7x
În a treia zi
75 km
Cât de lung este drumul
= 1 / 3x + 15 + 75 + 2/7 (2 / 3x).