The number of rows in an auditorium can be represented by the function f of x is equal to 80 x The number of seats in each row can be represented by the function g of x is equal to x plus 7 Which function represents the total number of seats, h of x is equal to f x g x ?
Answer
A
h of x is equal to 80 x squared plus 560
B
h of x is equal to 80 x squared plus 560 x
C
h of x is equal to 80 x plus 560
D
h of x is equal to 136 x
Explanation
The total number of seats is the number of rows multiplied by the number of seats in each row, so h(x) = f(x)g(x) = 80x(x + 7). Distributing 80x gives 80x² + 560x, which is choice B.
AI-written and checked against the verified answer.