Suppose u={,-2,-1,0,1,2,} is the universal set and r={,-1,1,}. what is r'?

a.{-2,0,2}
b.{,-2,0,2,}
c.{,-2,2,}
d.{-4,-2,2,4}

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Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.