The expression that shows number of miles Tom jogged more than Angie is 1.8x - 4
Solution:
Given that expression 1.2x + 4 is the number of miles Angie jogged and 3x is the number of miles tom jogged in x hours
To find: Expression to show how many more miles Tom jogged than Angie
From given question,
number of miles Angie jogged = 1.2x + 4
number of miles tom jogged = 3x
Where "x" is the number of hours
Number of miles Tom jogged more than Angie = number of miles tom jogged - number of miles Angie jogged
Number of miles Tom jogged more than Angie = 3x - (1.2x + 4)

Thus the expression that shows number of miles Tom jogged more than Angie is 1.8x - 4