Question

Lilla read 1/5 of her book last week. This week she read 3 times as much as she read last week. a. Write an expression to show how much of her book Lilla has left to read. Then simplify the expression. _______________________________________________________ _______________________________________________________ b. There are 75 pages in Lilla's book. How many pages does she have left to read? Show your work. Solution:___________________________________________________

Answer 1

Answer: she has 30 pages left to read.

Step-by-step explanation:

Let x represent the total number of pages in the book which Lilla is reading.

Lilla read 1/5 of her book last week. This means that the number of pages that she read last week is

1/5 × x = x/5

This week she read 3 times as much as she read last week. This means that the number of pages that she read this week is

3 × x/5 = 3x/5

The number of pages that she has left to read would be

x - 3x/5

= (5x - 3x)/5 = 2x/5

b. There are 75 pages in Lilla's book. It means that the number of pages that she has left to read would be

(2 × 75)/5 = 150/5

= 30