# Convert Fluid Ounces to Half-Gallons Using Unit Fractions and Proportions

This video explains how to perform a conversion using unit fractions and proportions.

# Show Tangent Lines to a Surface Using 3D Calc Plotter – Directional Derivative

This video using 3D Calc Plotter to illustrate the meaning of a directional derivative.

# Ex 1: Write a Step Function Using the Unit Step Function

This video explains how to write an equation of a step function using the unit step function.

# Ex 2: Write a Step Function Using the Unit Step Function

This video explains how to write an equation of a step function using the unit step function.

# Ex: Write a Ramp Function Using the Unit Step Function

This video explains how to write an equation of a ramp function using the unit step function.

# Problem Solving Using Gas Mileage and a Graph (Common Core Math 7/8 Ex 10)

This video explains how to solve a problem involving gas mileage, cost per gallon of gas, reading a graph, and fractions.

# Solving Trigonometric Equations Using Substitution for Angles

This video explains how to solve a trig equation on a given interval by performing substitution for the given angle.