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January 31, 2015

January 31, 2015

Posted by **Anonymous** on Monday, May 9, 2011 at 8:32pm.

- algebra -
**Damon**, Monday, May 9, 2011 at 9:10pmx of 30 sec so (14-x) are 60 sec

11*60 = 660 sec

so

30 x + 60(14-x) = 660

870 - 30 x = 660

30 x = 210

x = 7

- algebra -
**Reiny**, Monday, May 9, 2011 at 9:14pmshort commercial --- x

long commercial ---- y

x+y = 14 , #1

30x + 60y =11(60)

x + 2y = 22 , #2

#2 - #1

y = 8

then x = 6

6 shorts , 8 long

check : 6+8 = 14

30(6) + 60(8) = 180+480 = 660 = 11(60)

- error 840 not 870 -
**Damon**, Monday, May 9, 2011 at 9:21pmx of 30 sec so (14-x) are 60 sec

11*60 = 660 sec

so

30 x + 60(14-x) = 660

840 - 30 x = 660

30 x = 180

x = 6

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