Let a be an m times n matrix. consider the statement. "for each b in set of real numbers r superscript m, the equation axequalsb has a solution." because of a fundamental theorem about such matrix equations, this statement is equivalent to what other statements? choose all that apply.

Of 400 people at the school carnival, 95% are students and the rest are teachers. a. how many students are at the school carnival? b. if 55% of the students at the school carnival are boys, how many are girls? c. how many teachers are at the school carnival? d. if 35% of the teachers are male and the rest are female, how many female teachers are at the carnival?