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1. Critical Thinking & Problem Solving1h 59m

Inductive and Deductive Reasoning
46m

Estimation and Graphs
49m

Problem Solving
24m

2. Sets4h 25m

Basic Set Concepts and Notation
24m

The Empty Set
6m

Subsets
43m

Complement of a Set
23m

Intersections and Unions
1h 40m

Venn Diagrams and Operations with Three Sets
35m

Set Applications: Survey Problems
32m

3. Logic4h 33m

Statements and Negations
18m

Quantifiers
20m

Logical Connectives
1h 0m

If-Then Statements (Conditionals)
21m

Truth Tables for Negations, Conjunctions, and Disjunctions
42m

Truth Tables for If-Then Statements
29m

Equivalent Statements
30m

Logical Arguments
33m

Standard Forms of Arguments
15m

4. The Real Number System3h 5m

Integers & the Order of Operations
15m

Rational Numbers
39m

Irrational Numbers
16m

Dividing Square Roots
18m

Exponent Rules
1h 0m

Power Rules
34m

5. Algebra Review8h 43m

Evaluating Algebraic Expressions
15m

Simplifying Algebraic Expressions
1h 2m

Linear Equations
38m

Direct & Inverse Variation
27m

Linear Inequalities in One Variable
41m

Quadratic Equations
59m

Rectangular Coordinate System
28m

Intro to Functions and Notation
29m

Domain and Range
10m

Using Intercepts to Graph Lines
4m

Slope and Slope-Intercept Form
58m

Systems of Linear Equations
1h 25m

Systems of Linear Inequalities
37m

The Quadratic Formula
24m

9. Geometry3h 45m

Intro to Geometry
14m

Introduction to Angles
27m

Intro to Polygons
3m

Basics of Triangles
8m

Similar Figures
28m

Right Triangles and Pythagorean Theorem
9m

Perimeter and Area of Polygons
30m

Circles
23m

Special Right Triangles
20m

Trigonometry
39m

Intro to Fractals
18m

4. The Real Number System

Dividing Square Roots

Quantitative Reasoning

4. The Real Number System

Dividing Square Roots

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Struggling with Quantitative Reasoning?

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Multiple Choice

Rationalize the denominator.
$- \frac{5}{2 \sqrt{7}}$

A

$- \frac{5}{14}$

B

$- \frac{5 \sqrt{7}}{2}$

C

$- \frac{5 \sqrt{7}}{14}$

D

$-\(\frac{10\sqrt7}{14}\)$

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