Answer:
starting amount in his savings account
Step-by-step explanation:
An equivalent expression would be 2x+4
If a line's slope is

, the slope of the perpendicular line is

in this case, the given line has a slope 4, which is 4/1, so the perpendicular line has a slope/gradient
There are two different ways she can write on her pages.
1) With one journal entry
2) With two journal entries

There are
twenty different ways she can write them in her journal.