I have the following equations:

(Where d = distance, t = time)

1) d = 1.5 + 0.8t

2) d = 2.8 + 0.7t

3) d = 0.1t(t - 4.5)

4) d = 0.03t^{2}+ 0.6t

5) d = 0.1t^{3}- 1.8t^{2}+ 8.1t

I am asked to "find all of the intersections for all 5 functions for the domain [12, 14]".

I know how to find the intersections of a pair of equations individually, but I'm unsure how to tackle this question in relation to all five functions and the domain as a whole.

Some guidance would be much appreciated.

Thanks in advance.