Noah and audrey are simplifying the expression 5x-4+x+2, whos is wrong and why;
noah: 5x - 4 + x + 2 = 5x - 2
audrey: 5x - 4 + x + 2 = 6x - 2
also write an expression that contains three terms that is in simplest form. one of the terms should be a constant

For one history test, keith had to answer 40 questions. of these 40 questions, keith answered 28 of them correctly. what percent did keith get on his history test? round your answer to the nearest tenth if necessary

What are “like terms”? why can we only add like terms?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0