Afarmer had 15 sheep, and all but 8 died. how many are left?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

Heterogeneous mixture with larger particles that never settle is