24pr+3 (p+2pr) simplify and explain

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys