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Published bySydnee Talcott Modified over 3 years ago

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Warm up # 28 1.) 1. How many more days until winter break?

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Page 383, 1 - 6

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Let t = hours after fast train leaves +3

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Correct Homework Page 384 (4,5,6,9,10,13,14)

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Page 383, #4 3 hours

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Page 383, #5 69 miles

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Page 383, #6 Let t = hours after the JET leaves + 2

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P.383, #9 +2

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1. Betty leaves her purse in a store at the mall and averages 36 mi/h on her way home to Glenville, 140 miles away. Honest Harry discovers her purse and starts after her one hour later. If he averages 48 mi/h, how long will it take him to catch Betty? Will he catch her before she reaches Glenville? 2. Fred leaves the corner of Maple Avenue and Front Street on his bicycle, and travels west at 14 km/h. Two hours later Celia leaves the same corner and walks east at 5 km/h. How many hours does it take for Fred and Celia to be 104 km apart? It takes a small jet plane 4 hours less time than it takes a propeller-driven plane to travel from Glen Rock to Oakville. The jet plane averages 637 km/h while the propeller plane averages 273 km/h. How far is it from Glen Rock to Oakville? Page 385 #10 Let t = time it takes the prop plane to make the trip d = 1911 km - 4 637 273 t = 7

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The distance from home to work is 25 miles, and the total trip took 2 hours. 1. Betty leaves her purse in a store at the mall and averages 36 mi/h on her way home to Glenville, 140 miles away. Honest Harry discovers her purse and starts after her one hour later. If he averages 48 mi/h, how long will it take him to catch Betty? Will he catch her before she reaches Glenville? 2. Fred leaves the corner of Maple Avenue and Front Street on his bicycle, and travels west at 14 km/h. Two hours later Celia leaves the same corner and walks east at 5 km/h. How many hours does it take for Fred and Celia to be 104 km apart? A motorcycle breaks down and the rider has to walk the rest of the way to work. Page 385 #13 Let d = distance on motorcycle Let t = hours on motorcycle Motorcycle was traveling at 45 mi/h, and he walks at 6 mi/h. 456 d 25 miles t 25-d2-t

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jog walk 1. Betty leaves her purse in a store at the mall and averages 36 mi/h on her way home to Glenville, 140 miles away. Honest Harry discovers her purse and starts after her one hour later. If he averages 48 mi/h, how long will it take him to catch Betty? Will he catch her before she reaches Glenville? 2. Fred leaves the corner of Maple Avenue and Front Street on his bicycle, and travels west at 14 km/h. Two hours later Celia leaves the same corner and walks east at 5 km/h. How many hours does it take for Fred and Celia to be 104 km apart? A student walks and jogs to college each day. The student averages 5 km/h walking and 9 km/h jogging. The distance from home to college is 8 km and the trip takes one hour. How far does he jog? Page 385 #14 Let y = hours jog Let x = distance jog 5 x = 6.75 km 9 y1-y x8-x

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1. Betty leaves her purse in a store at the mall and averages 36 mi/h on her way home to Glenville, 140 miles away. Honest Harry discovers her purse and starts after her one hour later. If he averages 48 mi/h, how long will it take him to catch Betty? Will he catch her before she reaches Glenville? 2. Fred leaves the corner of Maple Avenue and Front Street on his bicycle, and travels west at 14 km/h. Two hours later Celia leaves the same corner and walks east at 5 km/h. How many hours does it take for Fred and Celia to be 104 km apart? A student walks and jogs to college each day. The student averages 5 km/h walking and 9 km/h jogging. The distance from home to college is 8 km and the trip takes one hour. How far does he jog? Distance =(Rate)(Time) Walking5 Joggingx9 total 81 Page 385 #14 Let x = distance jog Let y = hours walk y 8 - x1 - y 8 – x = 5(1 – y) x = 9y x = 6.75 km

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Tailwind & Up Stream Problems in 8.5 The tailwind and current problems affect the rate.

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Distance to tree = 12 Km How fast is the canoe going? 3 hours

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Pattern Tailwind and current problems talk about going to a location and coming home. The distance will be the same and we will set the distances equal to each other

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A motorboat took 3 hours to make a downstream trip with a current of 6km/h. The return trip against the same current took 5 hours. Find the speed of the boat in still water. r = 3 5 +6 - 6

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An airplane flew for 5 hours with a tailwind of 25 km/h. The return trip against the same wind took 6 hours. Find the speed of the airplane in still air. r = 6 5+25 -25

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= r + -

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6 km

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Assignment Page 383 7, 8, 11, 12,15,16

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Example 1 A train leaves Slaton traveling east at 80 kilometers per hour. An hour later, another train leaves Slaton on a parallel track at 120 km/hr.

Example 1 A train leaves Slaton traveling east at 80 kilometers per hour. An hour later, another train leaves Slaton on a parallel track at 120 km/hr.

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