DE = 4x + 10, EF = 2x - 1, and DF = 9x - 15

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

What is the solution to the equation in the & show work i’m very

Can someone me out here and the tell me the greatest common factor