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Algebra 2 6-6 Complete Lesson: Function Operations

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Last updated over 4 years ago
25 questions
Note from the author:
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A complete formative lesson with embedded slideshow, mini lecture screencasts, checks for understanding, practice items, mixed review, and reflection. I create these assignments to supplement each lesson of Pearson's Common Core Edition Algebra 1, Algebra 2, and Geometry courses. See also mathquest.net and twitter.com/mathquestEDU.
Question 1
1.

Question 2
2.

Solve It! In the above item, how much do you save by choosing the less expensive option?
Enter your response in this format: $12.30

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Question 6
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Question 7
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Question 8
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Question 16
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Error Analysis: Your friend used some simple functions and found the following to be true for particular functions f and g and concluded that function composition is commutative.

Give an example to show that your friend is mistaken.
Define each of the following in your counterargument:
f(x)
g(x)
(f °g)(x)
(g ° f)(x)
Note: To form a counterexample, (f °g)(x) should not equal (g ° f)(x).

Question 17
17.

Open-Ended: Find two functions f and g such that, for all real numbers x

Question 18
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Question 19
19.

Review Lesson 5-7: Expand the binomial. Respond with a polynomial in standard form.
Recall the Binomial Theorem and Pascal's triangle.
Do not use commas in coeffients.

Question 20
20.

Review Lesson 3-1: Graph the system. Take note of the solution(s). Zoom and pan your graph to establish and appropriate viewing window.

We have released a new and improved Graphing question type! Students will no longer be able to answer this question.
Question 21
21.

Review Lesson 3-1: Graph the system. Take note of the solution(s). Zoom and pan your graph to establish and appropriate viewing window.

We have released a new and improved Graphing question type! Students will no longer be able to answer this question.
Question 22
22.

Question 23
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Question 24
24.

Notes: Take a clear picture or screenshot of your Cornell notes for this lesson. Upload it to the canvas. Zoom and pan as needed.

For a refresher on the Cornell note-taking system, click here.

Question 25
25.

Reflection: Math Success

Solve It! You want to buy a sofa that was marked down by $100 before the clearance discount was applied.

The furniture store may add the 5% sales tax before applying the additional discount, or it may add the sales tax after applying the additional discount. Which way is better for you, the customer?
After
Before
Question 3
3.

Question 4
4.

Question 5
5.

Problem 4 Got It? A store is offering a 15% discount on all items. Also, employees get a 20% discount (20% off original price(s)). Write a composite function to model taking the 15% discount and then the 20% discount.
Let D(x) = cost after applying the 15% discount, E(x) = cost after applying the 20% employee discount, and x = cost of item(s). Then D(x) = 0.80x and E(x) = 0.85x. (E â—¦ D)(x) = 0.68x.
Let D(x) = cost after applying the 15% discount, E(x) = cost after applying the 20% employee discount, and x = cost of item(s). Then D(x) = 0.85x and E(x) = 0.80x. (E â—¦ D)(x) = 0.68x.
Problem 4 Got It? A store is offering a 15% discount on all items. Also, employees get a 20% discount (20% off original price(s)). Write a composite function to model taking the 20% discount and then the 15% discount.
Let D(x) = cost after applying the 15% discount, E(x) = cost after applying the 20% employee discount, and x = cost of item(s). Then D(x) = 0.80x and E(x) = 0.85x. (D â—¦ E)(x) = 0.68x.
Let D(x) = cost after applying the 15% discount, E(x) = cost after applying the 20% employee discount, and x = cost of item(s). Then D(x) = 0.85x and E(x) = 0.80x. (D â—¦ E)(x) = 0.68x.
Problem 4 Got It? Reasoning: In the scenario above, which order of discounts results in a lower cost to the employee?
The total discounts are the same, so it does not matter which discount you take first.
Taking the 15% discount first results in a lower price.
Taking the 20% discount first results in a lower price.
Question 10
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Question 11
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Question 12
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Question 13
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Question 14
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Question 15
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Review Lesson 6-5: Identify the solution(s) to each equation on the right. Be sure to check for extraneous solutions.
-2
0
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Vocabulary Review: Identify the item(s) from the left that match the categories on the right. (Each category will contain a single item from the left.)
input
output
Represents function notation and can be read "g of x"
Shows a function rule
The function rule below represents the cost of a number of tons f wheat t.
The number of tons of wheat is the __?__ of the function.
Use Your Vocabulary: Complete each sentence with the correct form of the word composite.
composite
composition
compose
VERB: The musician worked to __?__ a new piece of music.
ADJECTIVE: A __?__ number has more than two factors.
NOUN: The poster was a __?__ of photos and famous quotes.
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Problem 2 Got It?
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Problem 3 Got It?
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