National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Interval Notation
"Dr. Math" provides an explanation on how to express the solution of a conjunction inequality using interval notation.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving Inequalities
This site goes through steps to graph an inequality posed by a student.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Solving Linear Inequalities: Picture a Number Line
Dr. Math presents a visual (graphical) approach to solving a conjunction inequality.
Houghton Mifflin Harcourt
Holt, Rinehart and Winston: Homework Help Independent Practice: Compound Statements
Get independent practice working with compound statements. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Compound Inequality (No Intersection)
"Dr. Math" responds to a student question about possible solutions to compound inequality problems, the Dr. addresses the possiblity of no intersections for a conjunctive answer.