3-1 Solve It!
24
20
Trikes
There is just one
way that 25 bikes
and trikes can
have a total of
60 wheels.
There are 25 bikes and trikes at
the park. The bikes and trikes have
60 wheelss in all. In the graph, the red
dots show
w sums of 25. The blue dots
show 60-wheel
60-w
combinations. How
many bikes and trikes are in
the park? Explain.
16
12
8
O
2
4
6
Bikes
8
10
3-1 Lesson Quiz
1. What is the solution of the system?
e
x 2 2y 5 27
2x 1 y 5 6
2. Do you UNDERSTAND? You and a friend start a typing class
at the same time. You measure your
speed weekly in words per minute
(WPM) on a class chart. If the trend
continues, after how many weeks
can you expect to type as quickly as
your friend? What will that WPM be?
Weeks
0
1
2
3
Your WPM
13
16
19
22
Your Friend’s
WPM
20
22
24
26
3. Use linear regression on your calculator for the points
(1.0, 2.6), (2.3, 2.8), (3.1, 3.1), (4.8, 4.7), (5.6, 5.1), (6.3, 5.3).
Where does this line intersect x 5 0?
4. Without graphing, is the system of equations independent,
dependent, or inconsistent?
2x 1 y 5 6
e
12 2 y 5 4x
Answers
Solve It!
Lesson Quiz
15 bikes and 10 trikes
1. (1, 4)
2. 7 weeks; 34 WPM
3. (0, 1.7)
4. independent
Prentice Hall Algebra 2 • Solve It/Lesson Quiz on Transparencies
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