Question

Sumaya is reading a book with 240 pages.She has already read 90 pages.She plans to read 20 more pages each day until she finishes the book.
a. sumaya writes the equation 330= -20d to find the number of days she will need to finish the book. Identify the areas that sumaya made.

b.Write and solve an equation to determine how many days sumaya will need to finish the book. In your answer, count part of the day as a full day.

Answer 1

A) Sumaya adds the number of page and number of the pages she already read too gets 330 and -20 is the number page she wants to read.

b) 150 = 20d the answer is about 7 to 8 days

explain :
Zumaya adds 240 page and 90 page she read together. the reason it's wrong because the book only had 240 page, you can't add the page you had read together you need to subtract the 240 to 90 to get 150 to know how many pages she has to read.