Suppose that the function f(x)= 12x + 3 represents the number of cars that drive by in x minutes. How many cars will drive by in 7 minutes?
A. 87
B. 252
C. 36
D. 22
To find the number of cars that will drive by in 7 minutes, we substitute x = 7 into the function f(x) = 12x + 3.
f(7) = 12(7) + 3
= 84 + 3
= 87
Therefore, the number of cars that will drive by in 7 minutes is 87.
The correct option is A. 87.