Posted by Bella on Thursday, January 8, 2009 at 12:27am.
The ratio of adults to children at a holiday concert is expected to be 5 to 2. If 490 peole attend, approximately how many will be children? How many will be adults?
Thank you! Last problem and cant figure it out!
- algebra - Vgpsa, Thursday, January 8, 2009 at 12:41am
a = adults
c = children
p = people
a = (5/2)c
p = a + c
PLUG IN p&a, SOLVE FOR C
490 = (7/2)c
490 = (7/2)c
c = 140
SOLVE FOR A
a = 490 - 140 = 350
- algebra - Reiny, Thursday, January 8, 2009 at 1:04am
let number of adults be 5x
let number of children be 2x
then 5x+2x = 490
so adults = 5x = 350
children = 2x = 140
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