Lesson 11
Comparing Groups
Let’s compare two groups.
Problem 1
Compare the weights of the backpacks for the students in these three classes.
![Three dot plots for “backpack weight in pounds” are labeled “seventh grade,” “ninth grade,” and “eleventh grade.”](https://cms-im.s3.amazonaws.com/rzPQZ2E4Cs8q1JtQRfhNWgcc?response-content-disposition=inline%3B%20filename%3D%227-7.8.C.PP.Image.01.png%22%3B%20filename%2A%3DUTF-8%27%277-7.8.C.PP.Image.01.png&response-content-type=image%2Fpng&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAXQCCIHWF3XOEFOW4%2F20240630%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20240630T162328Z&X-Amz-Expires=604800&X-Amz-SignedHeaders=host&X-Amz-Signature=be1ca7851e44a49e9273bcbeb5bdf1646d6f593d91e31d38c1a059c8e8435862)
Problem 2
A bookstore has marked down the price for all the books in a certain series by 15%.
- How much is the discount on a book that normally costs $18.00?
- After the discount, how much would the book cost?
Problem 3
Match each expression in the first list with an equivalent expression from the second list.
Problem 4
Angles \(C\) and \(D\) are complementary. The ratio of the measure of Angle \(C\) to the measure of Angle \(D\) is \(2:3\). Find the measure of each angle. Explain or show your reasoning.