What is the value of x? and how did you find out

Asap will give brainliest and a lot of points

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

Measures of the angle of r, 31 s (x+4) t (3x+9)