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For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

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.