TSI Math Crash Course Update

Introduction

• Mr. Twoe, creator of the TSI Math Crash Course series, announces an update to the course.
• Updates are aligned with the newest concepts and question types on the TSIA 2 math exam.
• Video aims to teach quick methods to solve updated question types.

Day Six Update Overview

• A student named Bailey joins to discuss questions from practice tests and recent TSI exams.
• New concepts covered include absolute value, trapezoids, graphing a circle on the XY plane, and more complex geometry.

Question Types and Solutions

1. Graphing Equations

• Example Question: Identify the equation depicted on a graph.
• Approach: Check if students have seen graph equations like lines or parabolas.
• Tip: Plug in values from the XY axis into the equations to solve.
• Absolute Value: Recognize as V-shaped graphs, and know how to solve using absolute value properties.

2. Factoring Polynomials

• Example Question: Identify a factor of a polynomial.
• Approach: Avoid traditional factoring methods; use arithmetic by plugging values into the polynomial and answer choices.
• Definition of a Factor: Numbers or terms that multiply to give another number or term.
• Tip: Test answer choices to see which yield true statements.

3. Understanding Percents

• Example Question: Calculate how many seeds sprouted out of 400 when 85% sprouted.
• Approach: Recognize percentage means "per hundred" and convert 85% to 0.85.
• Calculation: Multiply the total by 0.85 for the answer.

4. Percent Increase

• Example Question: Calculate employee increase by 35% for a company with 140 employees.
• Approach: Either find 35% of the current number and add it to the original or use a one-step multiplication (1.35).
• Tip: Understand that a percent increase involves multiplying by a number greater than 1.

5. Percent Decrease Over Time

• Example Question: Determine stock value after losing 20% annually.
• Approach: Use one-step calculation or plug in values for time (T) to test answer choices.
• Tip: Multiplying by a number like 0.8 each year signifies a 20% decrease.
• Plugging in Values: Helps confirm answers by testing concrete examples.

Conclusion

• Understanding operations and practicing plugging in values are key strategies.
• The updated course covers critical concepts for success on the TSIA 2 exam.
• Students should explore both calculated and logical methods to confirm answers.