Proportions Where the extreme meets the means What

Another way to tell if it is a true proportion Both rates and ratios

Answers pg 120 1) a)yes b)yes c)no d)no e)no f)no 2) No, since 2.

Answers cont… No, since cost per player is not the same(17$ and 14. 96$)

Solving proportional situations Mass(kg) 2. 5 … 7. 5 Price($) 6. 45 … ?

Solving proportional situation Unit rate method Find the missing value using a rate or

Lets try http: //www. math. com/school/subject 1/practice /S 1 u 2 L 2/S 1

Answers pg 130 1) A) 21 b) 15 c) 1 D) 88 e) 36

Pg 130 answers 3) a)x=33, y= 222 b) x=10. 4 y=3. 57 c)x=10, y=

Pg 131 answers 5) a) le Cavalier b) 65. 35$

Answer pg 132 7)a) 0. 04 g 2) 0. 1 g 3)0. 17 g

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Proportions Where the extreme meets the means

What is it for?

What is it?

Extremes and Means

Cross product

Is this a true proportion?

Another way to tell if it is a true proportion Both rates and ratios must be equivalent Are these 2 ratios proportional? 7: 6= 21: 18 Yes Both share a factor of 3

Homework Pg 120#1, 2

Answers pg 120 1) a)yes b)yes c)no d)no e)no f)no 2) No, since 2. 75/12=0. 23/unit B) yes, both cases she walking at 22. 5 min/km C) yes, since both cases, jeans car burns 35 L/week D) No, since 1/9. 25=0. 11 and 21/89. 25=0. 24

Answers cont… No, since cost per player is not the same(17$ and 14. 96$) Yes, in both cases admission is 8. 75$/person

Solving proportional situations Mass(kg) 2. 5 … 7. 5 Price($) 6. 45 … ?

Solving proportional situations

Solving proportional situation Unit rate method Find the missing value using a rate or ratio that is already known. Mass(kg) 1 4 11 Price($) 3. 85 15. 40 ? 1)Pick any rate that is already there. 2)Put it into a proportion with the with rate that has missing information

Solving proportional situations

Lets try http: //www. math. com/school/subject 1/practice /S 1 u 2 L 2/S 1 U 2 L 2 Pract. html http: //www. arcademicskillbuilders. com/games /dirt-bike-proportions. html

Homework Pg 130 #1, , 3, 4, 5

Answers pg 130 1) A) 21 b) 15 c) 1 D) 88 e) 36 f) 9 2. No, because Henri will be same height at 48 B) yes, because 7/3=? /5 C) No, you cannot predict speed 2 min after start of race. D) yes, 8/1=42. 195/? E) No, because 5 sugar maples will reach full maturity at same time, age 40

Pg 130 answers 3) a)x=33, y= 222 b) x=10. 4 y=3. 57 c)x=10, y= -39, -221 D) x=0, 2. 1, y=36 4) a) with 1. 26 L of water and 10. 5 g of sugar B) 666. 67 ml and 20 g C) 1600 ml and 5. 76 L

Pg 131 answers 5) a) le Cavalier b) 65. 35$

Answer pg 132 7)a) 0. 04 g 2) 0. 1 g 3)0. 17 g B) yes, it can lift object weighing up to 7. 875 g C) 9812. 25 kg 10) a) 85 b) 63. 75 c) badminton 96, jumping rope 57. 6 d) bowling 47. 25, dancing 31. 5

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