I NEED HELP WITH THE 2ND ONE PLEASE HELP ME

Agraph of a trapezoid can have diagonals with slopes that are negative reciprocals and two pairs of adjacent sides that are congruent, true or false, and why

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

Dean and karlene get paid to write songs. dean is paid a one-time fee of $20 plus $80 per day. karlene is paid a one-time fee of $25 plus $100 per day. write an expression to represent how much a producer will pay to hire both to work the same number of days on a song.