11-4 Solve It!
Three dogs all eat the same dog food. The number of days it takes
each dog to finish one bag of food is shown below. How many bags of
food will it take to feed all three dogs for two weeks? Explain.
f
Each dog eats part
of the dog food in
a bag every day.
The question is
how to make the
parts add up.
Time (days)
Time to Finish a Bag of Dog Food
14
12
10
8
6
4
2
0
Scruffy
Oscar
Gus
11-4 Lesson Quiz
1. What is the sum?
7
3
2h
7h
a.
1
b. y 2 2 1 y 2 2
4b
4b
24x
26x 2 1
2. What is the difference 2
2 2
?
2x 1 13x 1 6
2x 1 13x 1 6
7
6
3. What is the difference x 1 1 2 x 1 5 ?
4. Curtis rides his bike 9 miles one way then turns around and
rides back. On the return trip, his speed is increased 20%
because the wind is at his back. Let s be his speed in miles
per hour riding against the wind. What is an expression that
represents his total time in hours riding down and back?
5. Do you UNDERSTAND? Rowing upstream for 5 mi against
a strong current, your speed is 20% less than your normal
rowing speed. On the return trip downstream, your speed
is 20% greater than your normal rowing speed. Will you
finish the whole trip in the same time as if you had rowed at
normal speed throughout?
0672_hsm11a1seNA_1104.indd 672
Answers
Lesson Quiz
Solve It!
7 bags; explanations may vary.
1. a.
5
2b
1
2. x 1
6
x 1 29
x2 1 6x 1 5
16.5
4. s
3.
9h
b. y 2 2
5. No; your total time will be
about 4% longer than usual.
Prentice Hall Algebra 1 • Solve It/Lesson Quiz on Transparencies
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