Adding Polynomial Expressions. (

SIMPLIFY

what algebraic expression must be added to the sum of 3x^2+4x+8 and 2x^2-6x+3 to give 9x^2-2x-5 as the result?

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)

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.

An object in geometry with no width, length or height is a(n):