Answer:
you can use a calculator for this i think
Step-by-step explanation:
As the movement, it is not accelerated then
Xr = 30 T
Xp = 45(t-1)
they both will meet when x is the same, so
30T = 45T - 45
T = 3
they both will meet 3 hours after Roberto leaves, at 2 pm
Y will be your range and your independent value. X will be your domain and dependent value. Hope this helps.