Posted by john on Tuesday, February 17, 2009 at 6:49am.
rachel allows herself one hour to reach a sales appointment 50 miles away. after she has driven 30 miles, she realizes that she must increase her speed by 15mph in order to arrive on time. what was her speed for the first 30 miles?

algebra  tchrwill, Tuesday, February 17, 2009 at 10:35am
Rachel allows herself one hour to reach a sales appointment 50 miles away. after she has driven 30 miles, she realizes that she must increase her speed by 15mph in order to arrive on time. what was her speed for the first 30 miles?
The time to drive the first 30 miles is T1 = 30/V1.
The time to drive the last 20 miles is T2 = 20/(v1 + 15)
wHAT DO YOU KNOW ABOUT t1 + t2?

algebra  john, Tuesday, February 17, 2009 at 3:48pm
that it equals 60 minutes?
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