1. Chapter 5 Unit Question How do we solve applications of equations in algebra?

2. Open Learning Logs Date on Left…Section 5 – 4 on right

3. Estimate the following square roots: Warm – Up Section 5 – 4

4. Section 4 How do we find the distance between two points on a plane?

5. Homework Clickey

6. A BC AB? BC? AC? 4 6 ?? AC is approximately 7.2

7. The Distance Formula on a Number Line! Let x 1 and x 2 be coordinates on a horizontal number line The DISTANCE between them is… The same could be said for the y-axis as well… Let y 1 and y 2 be coordinates on a vertical number line The DISTANCE between them is…

8. L M N L: M: N: ( -6, -2) ( -6, 4) ( 6, -2 )

9. What happens if only M: ( -6, 4 ) and N: ( 6, -2 ) are given? From the last slide, we had… THE DISTANCE FORMULA IN THE COORDINATE PLANE But what was the last operation we used? We Square-Rooted both sides! Doing that in the formula give us…

10. M: ( -6, 4 )N: ( 6, -2 )A: ( 4, 2 )L: ( 7, 11 )

11. Homework HoffmaSheet 5 – 4