Answer:
f(x) = 1500 -5x; g(x) = x(1500 -5x)
Explanation:
Subtracting $5 from the base price of $1500 for each person x in the group gives a price per person of ...
f(x) = 1500 -5x
The cost for the group is the cost per person (f(x)) times the number of people in the group (x).
g(x) = x·f(x)
g(x) = x(1500 -5x)