On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip, the average speed was y miles per hour. The average speed for the round trip was 60 miles per hour. 30x x - 30 Average speed= (a) Verify that y= 60 = 60y + 60x 60x 60x = Total distance Total time =y (d/x) + (d/y) - 60y (x-30) What is the domain? (Enter your answer using interval notation.) (b) Complete the table. (Round your answers to three decimal places.) 35 55 (c) Find the limit of y as x approaches 30 from the right. (If an answer does not exist, enter DNE.)
On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip, the average speed was y miles per hour. The average speed for the round trip was 60 miles per hour. 30x x - 30 Average speed= (a) Verify that y= 60 = 60y + 60x 60x 60x = Total distance Total time =y (d/x) + (d/y) - 60y (x-30) What is the domain? (Enter your answer using interval notation.) (b) Complete the table. (Round your answers to three decimal places.) 35 55 (c) Find the limit of y as x approaches 30 from the right. (If an answer does not exist, enter DNE.)
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:On a trip of d miles to another city, a truck driver's average speed was x miles per hour. On the return trip, the average speed was y miles per hour. The average speed for the round trip was 60 miles per hour.
30x
(a) Verify that y
x - 30
Average speed =
60 =
60 =
60y + 60x =
60x =
60x =
Total distance
Total time
= y
(d/x) + (d/y)
y + x
- 60y
(x - 30)
What is the domain? (Enter your answer using interval notation.)
(b) Complete the table. (Round your answers to three decimal places.)
55
65
(c) Find the limit of y as x approaches 30 from the right. (If an answer does not exist, enter DNE.)
Transcribed Image Text:60x =
= y
What is the domain? (Enter your answer using interval notation.)
(b) Complete the table. (Round your answers to three decimal places.)
35
55
Interpret its meaning.
(x - 30)
45
As x gets close to
(c) Find the limit of y as x approaches 30 from the right. (If an answer does not exist, enter DNE.)
65
ml/h, y becomes --Select--
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