Miles driven to see a Space Shuttle launch: 19, 27, 14, 28, 30, 51, 28

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

Which expression is equivalent to the expression shown?

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)