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January 25, 2015

January 25, 2015

Posted by **chrissy** on Monday, July 27, 2009 at 6:48pm.

helppp?!?

- math -
**bobpursley**, Monday, July 27, 2009 at 6:56pm1080=vavg*time

1080=(vavg-6)(time+2.5)

from the first:

time=1080/vavg putting that into the second..

1080=(vavg-6)(1080/vavg +2.5)

1080=1080-6*1080/vavg + 2.5vavg-15

0=648+2.4 vavg^2 -15vavg

put it in standard form, use the quadratic formula. check my work.

=

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