26
Chapter 1
S
olving Linear Equations
1.1
–1
.3
Quiz
Solve the equation. Ju
stify each step. Check yo
ur solution.
(Section
1.1)
1.
x
+
9
7
2.
8.6
z
3.8
3.
60
12
r
4.
3
—
4
p
18
Solve the equation. Check yo
ur solution.
(Section
1.2)
5.
2
m
3
13
6.
5
10
v
7.
5
7
w
+
8
w
+
2
8.
21
a
+
28
a
6
10.2
9.
2
k
3(2
k
3)
45
10.
68
1
—
5
(20
x
+
50)
+
2
Solve the equation.
(Section
1.3)
11.
3
c
+
1
c
+
1
12.
8
5
n
64
+
3
n
13.
2(8
q
5)
4
q
14.
9(
y
4)
7
y
5(3
y
2)
15.
4(
g
+
8)
7
+
4
g
16.
4(
5
h
4)
2(10
h
+
8)
17.
To
estimate how
many miles you are from a thunderstorm, count the seconds between
when you see lightning and when you hear thunder
.
Then di
vide by 5.
Write and solv
e an
equation to determine how
many seconds you wo
uld count for a thunderstorm that is
2 miles away
.
(Section 1.1)
18.
Yo
u want to hang three equally-sized trav
el posters on a wa
ll so that the posters on the ends
are each 3 feet from the end of the wall.
Yo
u want the spacing between posters to be equal.
Write and solve an equation to determine ho
w much sp
ace you should leav
e between the
posters.
(Section 1.2)
3 ft
2 ft
2 ft
15 ft
2 ft
3 ft
19.
Y
o
u want to paint a piece of pottery at an art studio. T
he total cost is the cost of the piece
plus an hourly studio fee. There are tw
o studios to choose from.
(Section 1.3)
a.
After how
many hours of painting are the total costs the same at both studios? Justify
your answer
.
b.
Studio B increases the hourly studio fee by $2. Ho
w does this af
fect your answer in part (a)? Explain.
English
Spanish