The current of a river is 4 miles per hour. a boat travels to a point 30 miles upstream and back in 4 hours. what is the speed of the boat in still water

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

Which of the following represents the length of a diagonal of this trapezoid?

Which shows a reasonable estimation for 124% of 42 using the distributive property?