Setting up the system is easy.

For the first, it starts at the origin, so just remember, .

In this case, the first equation is .

In the second, it leaves 15 minutes later, i.e. 0.25 of an hour later.

So point 1 is .

If it travels at 40miles/hour, then .

Plug them all into the equation to get c. (in this case, y = d = 0, x = t= 0.25, m = v = 40).

You should find that

So the second equation is .

Therefore the system of equations is

.

Can you solve them to see where they meet?