Jenna has already written 35 pages, and she expects to write 1 page for every additional hour spent writing. How many hours will Jenna have to spend writing this week in order to have written a total of 50 pages?

15 hours

Step-by-step explanation:

When reading the context it gives you two important numbers; the first one being (35).

Next important number is that she is going to spend (1) hour for each additional page she writes.

Third important number is that she needs a total of (50) pages.

Now lets arrange the numbers in an order we can find the solution to the problem at hand.

take 50-35=15. For her to have a total of 50 pages Jenna will need to write 15 more pages, if Jenna writes 15 more pages and each page takes an hour she will spend 15 hours total.