Hi its my birthday!! please help me
I think it might be choice letter A or B ?? im stuck

Ze trinomial x2 + bx – c has factors of (x + m)(x – n), where m, n, and b are positive. what is ze relationship between the values of m and n? explain how you got ze answer

What is the domain of the step function f(x)=[2x]-1?

In a recent year, the weather was partly cloudy 2/5 of the days. assuming there are 356 days in a year, how many days were partly cloudy?