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johnny read an entire series of books with a total of 5,249 pages. in the equation below, d is the number of days it took johnny to read the book series.

5,249 = 29d

what is the unit rate in the equation?

a. 5,220 pages per day
b. 29 pages per day
c. 5,249 pages per day
d. 181 pages per day

The unit rate you're trying to find is pages per day(or p/d), so the equation needs to have both a unit for pages and for days.
The equation we have is:

If they read 5,249 pages, then we can include the unit for pages in the equation.
Since we also know that d is the number of days it took, you can replace d with days.
The equation becomes:

Now that we have one variable, we can solve for p/d:

Thus it took them 181 days to read it all.

If Johnny read 5,249 pages over 181 days and the unit rate is pages per day(p/d), then the equation for finding p/d is:

Johnny read 29 pages per day.

The unit price is 0.99