2. Flashback 9-26-12 When graphed in the (x,y) coordinate plane, at what point do the lines x + y = 5 and y = 7 intersect? A. (–2,0) B. (–2,7) C. (0,7) D. (2,5) E. (5,7)

3. Joke of the day What did the square say to the circle?

4. You’re pointless!

5. Square/Cube Roots and the Pythagorean Theorem The square root of a positive number a, written, is the number we square to get a. If = b, then. Simplify:

6. Pythagorean Theorem: a² + b² = c²(c = hypotenuse, b and a = legs) If c is the hypotenuse of a Right Triangle, and a and b are legs, find the missing side of the Right Triangle: a = 12, b = 16, find c. 25 = c, b = 24, find a.17 = c, a = 8, find b.

7. Simplifying Square Roots (Radicals) Factor out the perfect square factors that are under the square root sign. Simplify:

9. Adding and Subtracting Square Roots Simplify-Then combine “like terms”. Simplify:

11. Quiz tomorrow over decimals, including computing circumference and area

12. Exit Slip In a triangle with sides a = 7, b = 24, find hypotenuse c.