1) The document provides information about an assignment that is due on Wednesday April 4th for Set 73 and a test on Thursday April 5th for Test #10. 2) It also includes warm-up problems and lesson examples for Lesson 73 on sequences, formulas for sequences, and examples of finding terms for various sequences using given formulas. 3) Key concepts covered are writing rules and formulas for sequences, special sequence names like triangular numbers, and using formulas to find specific terms of sequences.

1. Assignment:
1-->Set 73 (odds) - Due Wednesday (4/4)
2-->Test #10 - Thursday (4/5)
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2. Lesson 73 Warm-Up:
1) 38% of the students went to the Cards game. If there were 150
students in all, how many did not go to the Cards game?
2) Graph: y = 2x - 2 Does the graph show direct variation? Why or
why not?
3) Graph: y = 1/2x Does the graph show direct variation? Why or
why not?
4) What is the tax on a $85.97 purchase if the rate is 8%?
5) Solve: 2(x + 7) - 4 = 24
[show all steps!]
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3. Lesson 73:
fyi...when we have a sequence of numbers, we can write the
"rule" as a formula.
number of term (n) 1 2 3 4 5
value of term (a) 3 6 9 12 15
The rule-->multiply by 3
The formula--> an = 3n
So...to find the 7th term, plug in 7 for both "n's"
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4. Some sequences have special names...
1, 3, 6, 10, 15, ...
This is called triangular numbers because...
The formula for this sequence is: an = n(n + 1)
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100th term-->
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5. Lesson 73 Examples:
A) What is the 7th term in this sequence:
1, 4, 9, 16, ...
B) Using the formula an = 5n - 2 what would be the 10th term?
C) Which formula below generates the terms of this sequence?
0, 3, 8, 15
A. an = n - 1 B. an = 2n - 1 C. an = n2 - 1
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6. D) What are the first 4 terms in the sequence generated by
the formula: an = n2 + 2n + 1
E) What is the 20th triangular number?
F) Find the 20th term for the following sequence:
an = 2n - 3
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