Please please please PLEASE help me

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

10% of 1,900,000. show me how you got the answer

What statement is true? 2x^2-9x+2=-1