Alice is in a 20-km running race. She always runs the first half at an average speed of 2 km/h faster than the second nalf. a) Let x represent her speed in the first half. Determine a simplified expressic in terms of x for the total time needed for the race. ) If Alice runs the first half at 10 km/h, how long will it take her to run the
Alice is in a 20-km running race. She always runs the first half at an average speed of 2 km/h faster than the second nalf. a) Let x represent her speed in the first half. Determine a simplified expressic in terms of x for the total time needed for the race. ) If Alice runs the first half at 10 km/h, how long will it take her to run the
Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Transcribed Image Text:Alice is in a 20-km running race. She
always runs the first half at an average
speed of 2 km/h faster than the second
half.
a) Let x represent her speed in the first
half. Determine a simplified expression.
in terms of x for the total time needed
for the race.
b) If Alice runs the first half at 10 km/h,
how long will it take her to run the
race?
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