Answer:
he stayed 8 hours and 35 minutes
Step-by-step explanation:
15 -7 =8
45-10=35
Let
x-------> the first number
y------> the second number
we know that


equation 

equation 
substitute equation 1 in equation 2

using a graph tool-----> to resolve the second order equation
see the attached figure
the solution is

I would say go with with B
See the attached picture for the solution: