33.56 plus 41.98 = 75.54(total reading time for Hector)
31.61 plus 42.08= 73.69(total reading time of Liam)
75.54 minus 73.69= 1.85 more reading time than Liam
ANSWER:Hector read for 1.85 more minutes than Liam
Equal expressions can be taken equal to an another variable. The system of equations representing the equation is 
<h3>What is logarithm and some of its useful properties?</h3>
When you raise a number with an exponent, there comes a result.
Lets say you get
Then, you can write 'b' in terms of 'a' and 'c' using logarithm as follows
Some properties of logarithm are:

Log with base e = 2.71828... is written as
simply.
Log with base 10 is written as
simply.
The given equation is:

Adding
on both the sides, we get:

The, we get two equations as:

This is the needed system of equations.
Learn more about logarithms here:
brainly.com/question/20835449
25.9 miles is 49.68 kilometres
2.92 because you do 1.19 plus .89 which is 2.08 and then subtract five from 2.08 and you get 2.92
5x+7x-26y+32y
12x+6y
6(2x+y)