Lesson 95 Warm Up Pg. 631

Algebra 1 Lesson 95 Combining Rational Expressions with Unlike Denominators

Example 1: Find the LCD a. 3 _ 9 (x + 3) (x 2 – 2x – 15) b. 2x + 12x 4x x 2 + x – 56

Example 2 Add 6x 2 + x – 1 x 2 – 16 2x - 8

Example 3 Subtract 4x 2 _ 2x – 5 9x – 27 x 2 - 9

Example 4 a.Add x – 2 56 – 7x x 2 – 6x - 16 b.Subtract x – 5 _ x – 7 2x – 6 4x - 12

Example 5 A pilot’s single-engine aircraft flies at 230 kph if there is no wind. The pilot plans a round trip to a city that is 400 kilometers away. If there is a tailwind of w kilometers per hour, the time for the outbound flight is 400/230+w hours. The time for the return flight with a headwind of w kilometers per hour is 400/230-w hours. What is the total time for the round trip?

Lesson 95 Homework Pg. 634 Practice, #1-10