Hey there, 2 out of 5 is 2/5. There are a lot of fractions that is equivalent to 2/5, so I am only going to give you 3, 2/5=4/10, 6/15, and 8/40, 2*2=4 and 5*2=10.
In order to answer the question we need a picture of some kind
We can compare by converting Johnny's reading time into the same unit of Jacky's, hours.
There are 60 minutes in an hour, so use this:

15 < 20, so Johnny read faster. This is 5 pages faster per hour than Jacky.
1. (7 − 3i) • (2 − i)
It is simplified as follows:
14 - 7i -6i - 3
11 - 13i
2. <span>(−5 + 3i) • (1 − 2i)
</span><span>It is simplified as follows:
</span><span>-5 + 10i + 3i + 6
1 + 13i
3. (1 + 3i) + (2 − 5i)
</span><span>It is simplified as follows:
</span>1 + 3i + 2 − 5i<span>
3 - 2i
4. (6 + 2i) − (8 − 3i)
</span><span>It is simplified as follows:
</span><span>6 + 2i − 8 + 3i
</span>-2 + 5i