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Monthly Archives: October 2019

Chapter 3: Parallel and Perpendicular Lines
3.1: Pairs of Lines and Angles

EQ: Are parallel lines the only ones that don’t intersect?

Core Concept boxes (p. 126 and 129) are the most important ideas to know. Know the difference between parallel and skew lines. You also need to know the 4 pairs of angles formed when any 2 lines (not necessarily parallel — that’s the next lesson) are crossed by a transversal. Look at examples 1 and 3 (the ones after the Core Concept boxes).

Prep work:  p129(3-31)

5.4 Mathematical Models in Purchasing an Automobile

EQ: How much will your monthly car payment be if you have a down payment?

Notes: Look at Example 2 on p.234.

Prep work: Textbook: p238(19-23, 25, 26)

5.4 Mathematical Models in Purchasing an Automobile

EQ: How much will your monthly car payment be?

Notes: Example problems 7, 13 and 23 from p.238 were done in class.  Look at Examples #1 and 2 in text on page 233-234.

Prep work: Textbook: p238(7-18, 23, 24)

5.8 Mathematical Models in Personal Income

EQ: Can you pay the taxes from your paycheck?

Notes: How to read a tax table.  p260 Example 2 from text and Table 5-11.
Don’t forget that the phrase “the amount over” implies subtraction.

Prep work: Textbook: p264(9, 10, 16-20)  p267(1-3, 8)

5.8 Mathematical Models in Personal Income

EQ: Can you calculate your paycheck for a sales job?

Notes:
Straight Commission: Pay = (Commission Rate) * Sales
Base Salary plus Commission: Pay = Base Pay + (Commission Rate) * Sales
Base Salary plus Commission over a Minimum Sales Amount:
Pay = Base Pay + (Commission Rate) * (Sales Amount more than the Minimum)

Prep work: Textbook: p264(1-8, 11-14, 21)

2.6 Proving Geometric Relationships

EQ: Why can theorems be a great shortcut for other proofs?

Four new theorems and one postulate today.  They are the last ones listed under their sections in the handout below.  You will get to use a similar handout for the next assessment.

Prep work:  p111(3-6, 13-16, 18, 23, 31-36)

Handout: Ch 1/2 Definitions, Postulates, Properties and Theorems

5.2 Mathematical Models in Banking

EQ: What does it mean to compound continuously?

Notes: Continuous Compound Interest formula:  A = P e^(r * t)
A = Maturity (total amount P + I)   P = Principal    r = rate in decimal form
e = Euler’s number (2.718281828…)   t = time (years)

Prep work: Textbook: p225(27-30)  p216(9-10, 19-22)  p267(4-7, 9-13)

Retake Assignment (complete retest by 10/18):
p23(3-8, 17-27) p25(13-15) p47(1-7, 11-16, 21, 22) p49(8-12)
You also must complete at least 50% of the problems from all missing assignments.