I need help on this question and this time I took a picture

Which number produces a rationale number when multiplied by 1/5

X+ y = 5 ; x - y =3 solve using linear combination

Question 5 of 10 2 points if a population is a sample of the population could be a. registered voters; all citizens o o b. baptists; all religious people o c. people who purchased shoes; all customers o d. the entire school faculty; math teachers