Algebra 1 Common Core Student Edition, Grade 8-9

Lesso n Ch eck

Do y o u k n o w H OW?

Solve each proportion.

1.

3.

b = 4

6 5

w + 3

15

x

w

2 x + 1

5. Music A b a n d w en t to a recording studio an d
   recorded 4 songs in 3 h. How long w ould it take the
   b an d to record 9 songs if they record at th e sam e rate?

_ _ MATHEMATICAL

Do yo u UN DERSTAN D? PRACTICES

Vocabulary Use the proportion ™ Identify the

following.

6. t h e e x t r e m e s

7. th e m ean s


8. t h e c r o s s p r o d u c t s


9. Reasoning W hen solving | = |, Lisa’s first step
   was to write 4x = 5(3). Jen’s first step was to write
   2o(f) = 2o(|). Will b o th m eth o d s work? Explain.

Pr act i ce an d Pr o b l em - So l v i n g Ex er ci ses

Practice

MATHEMATICAL

PRACTICES

Solve each proportion using the Multiplication Property of Equality.

14.

4

' 5

3__x_

16 12

15.

4

9 = JL

2 25

x

26

16. 120 24

13.

See Problem 1.

m 3

17 ^ - = -u_

15 125

Solve each proportion using the Cross Products Property.

18.v 13 19.^15

22- -Jr =b I 6 23 - P 10 = —^

■j n 3 30

8 — m

2&— = — 4 22

See Problem 2.

25.-5

Solve each proportion using any method.

26. b + 4^7

30.k-2

2 = 2

3

_ 5

8

27.

31.3b+ 4 b -4

28.

32.

3 c + 4

7 35

q + 2 2 q^11

29.

^ See Problem 3.

2c c - 3

11

33. _1 = 4 2 7


34. Gardening A gardener is tran sp lan tin g flowers into a flow erbed. She h as b e e n See Problem 4.
    working for an h o u r a n d has tran sp lan te d 14 flowers. She has 35 m ore flowers to
    transplant. If she works at the sam e rate, how m any m ore h o u rs will it take her?


35. Florists A florist is m aking centerpieces. He uses 2 dozen roses for every
    5 centerpieces. How m any dozens of roses will he n e e d to m ake 20 centerpieces?

3 6. Picnics If 5 lb of p asta salad serves 14 people, how m u ch p asta salad should you

bring to a picnic w ith 49 people?

c

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