Transcript 2_9 Writing equations

p. 96
13
17
5x - 3
5x - 6
14
18
5y - 9
a-7
15
-3a + 9
19
-19x +2y
21
22
23
-16a+27b-32c -2x
25
26
27
29
30
31
9y – 25z
3m – 6n
33
a + 4b
-40
-6p + 2q
6x – 4y
34
-10
35
+ 6y
0
7
19
16
8n + 7
20
-a – 4b
24
-7a – 5b
28
12m + 5n
32
-14
(31) Simplify: [9 – 2(5 - 4)]
[9 – 2(1)]
7
(35)
[4(9 - 6) + 11] – [14 – (6 + 4 )]
[4(3) + 11] – [14 – (10 )]
[12 + 11] – [4]
19
QQ
1
A,C,E,G
B,D,F
Simplify:
5y – (2x – 3y)
7b – (3a – 5b)
2
6m – 3(5m – 2)
4j – 2(7j – 8)
3
50 –[12 – (16 + 5)]
39 –[13 – (15 + 3)]
QQ
1
2
3
A,C,E,G
B,D,F
Simplify:
5y – (2x – 3y)
7b – (3a – 5b)
8y – 2x
12b – 3a
6m – 3(5m – 2)
4j – 2(7j – 8)
6 – 9m – 9m +6
– 10j
16 –
+16
3910j
–[13 – (15 + 3)]
50 –[12 – (16 + 5)]
59
44
By inserting grouping symbols,
how many different values can
you give the expression
9 • 2 + 5 • 4 = 38
Problem Solving Strategy
Write an Equation
In two days Lupe hiked 65 km. She hiked
34.3 km the first day. How far did she
hike the second day?
Let x = km that Lupe hiked the second day.
34.3 km
x
65 km
65 = x + 34.3
x = 65 - 34.3
Dan earns $3 for every lawn he mows. How
many lawns must he mow to earn $54?
Let x = # of lawns mowed
$54 = x • $3
Tania sold three times as many tickets as
Michele. Michele sold 16 tickets. How many
did Tania sell?
Let T = tickets that Tania sold
Michele = 16
T = 3 • 16
PRACTICE TEST
Page 110, 1 - 55