Simplify -1/4m + 5/6 +3/8m - 2/3

HURRYYY PLEASE

Aplane flies around trip to philadelphia it flies to philadelphia at 220 miles per hour and back home with a tailwind at 280 miles per hour if the total trip takes 6.5 hours how many miles does the plane fly round trip

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.