A cab driver charges a fixed rate of $3 plus an additional $1.50 for each mile driven. When representing this situation with a function rule, which of the following would be the independent variable?

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g