Explain how you would round the number 33 and 89 to estimate their sum

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

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.