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
VARIABLES

a = adults

c = children

p = people

GIVENS

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

ANSWER

140 children

350 adults

- 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

7x=490

x=70

so adults = 5x = 350

children = 2x = 140

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