

First, let's change both of these times into just minutes. (We know that one hour is sixty minutes.)


Now, just subtract:

Answer:
z-9
Step-by-step explanation:
Right now, John is z-5. z-5 - 4 is equal to z -9.
Answer:
100,000,000,000
Step-by-step explanation:
5 <u>></u><em> 4</em>
The sign <u>></u> means greater than or equal to