Which expression represents the sum of (2x - 5y) and (x + y)?
А 3х – 4у
в 3х – бу
с x - 4у
d x- 6y

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible