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Warm-Up Exercises
Lesson 5.5, For use with pages 318-324
Are the lines parallel? Explain.
1. y – 2 = 2x, 2x + y = 7
ANSWER
2.
No; one place is 2 and the other is –2.
–x = y + 4, 3x + 3y = 5
ANSWER
Yes; both slopes are –1.
Warm-Up Exercises
Lesson 5.5, For use with pages 318-324
Are the lines parallel? Explain.
3. You play tennis at two clubs. The total cost C (in
dollars) to play for time t (in hours) and rent
equipment is given by C = 15t + 23 at one club and
C = 15t + 17 at the other. What is the difference in
total cost after 4 hours of play?
ANSWER
$6