Answer:
<h2>2a+18</h2>
Step-by-step explanation:

First find how much she makes per day for the 16 pages. Then divide it by the amount of hours she works to find her hourly average. So I guess you can use all these proportions.
Answer:
D. 12 hours
Step-by-step explanation:
You divide the total he made by how much he charges per hour to find out how many hours he worked.
540 divided by 45 equals 12.
Answer:
They each walked the same amount if you plug 7 into each of their expressions
Step-by-step explanation:
Karen walked 3(7) - 4 or 17 miles
Kristen walked 2(7) + 3 or 17 miles
1: -27/45. 2 : -1/2 hope this helps