Lesson 2E … and Row by Column Solidify Understanding

Ready

Add the given matrices. If the matrices can’t be added, give a reason why not.

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Set

5.

Recall from today’s lesson that in a context, each entry in a matrix represents two pieces of information, depending on the row and column in which it is located. Organize the following information into a matrix, and label the rows and columns.

The following number of items were sold during the lunch rush at Fried Freddy’s Café:

  • Day 1 – orders of fried chicken, orders of fish, and orders of french fries

  • Day 2 – orders of fried chicken, orders of fish, and orders of french fries

  • Day 3 – orders of fried chicken, orders of fish, and orders of french fries

  • Day 4 – orders of fried chicken, orders of fish, and orders of french fries

  • Day 5 – orders of fried chicken, orders of fish, and orders of french fries

6.

Find the product.

7.

Find the product.

8.

Find the product.

9.

Find the product.

Go

The following data represents a random sample of boys and girls and how many prefer cats or dogs. Use the information to answer the questions.

Cats

Dogs

Total

Boys

Girls

Total

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18.

If this is a random sample from a school, what total percent of boys in this school do you think would prefer dogs?

19.

What percent of students at the school would prefer cats?

20.

If you sampled a different 152 students, would you get the same percentages? Explain.

21.

What would happen to your percentages if you used a larger sample size?