If i work from 4: 50 p. m. to 10 o'clock p. m. how many hours did i work

Which of the following is true for the relation f(x)=2x^2+1

Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?