Algebra: Chapter 13, Lesson 7, page 602.
Using Quadratic Equations
Word problems need to be thought out before starting. Draw pictures and understand what information you know and what you need to find out. With DRT problems, you may need to manipulate the `D * R = T` to put it in terms of what you know. Equivalent equations are `R = T/D` and `D = T/R`.
The Pythagorean theorem will also come in handy for these types of problems! REMEMBER, `c^2 = a^2 + b^2`
Once you have the equation, it is probably going to be quadratic and you may have to come up with an LCM. Use all factors in the denominators and you should be fine.