1. Warmups Solve for x. Fifteen decreased by some number is 34. Find the number. a) Define a variable, b) write an equation, and c) solve a) b) c)

2. Distance Story Problems Notes are on a worksheet today!

3. Steps – write on back of notes paper. 1) Draw a picture2) Fill in the box 3) Write an equation4) Solve the equation 5) RE-READ THE QUESTION! d 1 + d 2 = d Total D 1 = D 2 r ∙ t = d Same time x 5 – x x x x x – 5 5 hrs later 5 hrs total

4. 1. Two jets leave Washington, D.C., at the same time, one traveling north at 850 km/h and the other traveling south at 750 km/h. In how many hours will they be 4800 km apart? r ∙ t = d d 1 + d 2 = d Total N S 850 750 x x 850x 750x Answer: 3 hours

5. 2. Jeanne and Teresa leave their campsite and paddle their canoe down a river at a constant rate of 6 km/h. Four hours later, Mei Ling leaves the campsite in a motorboat and travels down the river with the camping supplies. If the motorboat travels at 18km/h, how long does it take to overtake the canoe? r ∙ t = d D 1 = D 2 C M 6 18 x x – 4 6x 18(x – 4) Answer: 2 hours

6. r ∙ t = d 3. Walt rode his bike from home to the bicycle repair shop and then walked home. He averaged 18 km/h riding and 6 km/h walking. If his total travel time was one hour, how far is the shop from Walt’s home? D 1 = D 2 D1D1 D2D2 18 6 x 1 – x 18x 6(1 – x) Answer: 4.5 hours

7. Homework What Kind of Car does a Baker Drive?