y?? + 36y = 54x + 6, y (0) = 7 6, y?(0) = 1
Solve the initial-value problem.
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Solve the problem by setting up and solving a system of two linear equations in two variables.Chip downloaded 18 songs for his MP3 player for a total cost of $19.20 The songs from Muchmore Music cost $1.00 each, and the songs from Itunes cost $1.20 each. How many songs did Chip download from each service?
A. 12 songs from Muchmore. 6 songs from Itunes. B. 13 songs from Muchmore. 5 songs from Itunes. C. 10 songs from Muchmore. 8 songs from Itunes. D. 14 songs from Muchmore. 4 songs from Itunes. E. 11 songs from Muchmore. 7 songs from Itunes.
In the event of an emergency stop, the speed S, in miles per hour, of a car when brakes are applied can be calculated from the length L, in feet, of skid marks. The relationship is 
. Suppose skid marks are 67.40 feet long. Use functional notation to express the speed of the car, and then calculate that value.
?
A. 
miles per hour
B. 
miles per hour
C. 
miles per hour
D. 
miles per hour
Use the figure below to answer the following question(s).
Which graph has 3 components?
A. Graph 1 B. Graph 3 C. Graph 4 D. Graph 2 E. none of these
Find the limit, if it exists.
?
?
A. 
B. 
C. 
D. 
E. The limit does not exist