Chocolateisgr8
Chocolateisgr8
14-12-2016
Mathematics
contestada
help with number 16 please ???
Respuesta :
Apocrophon
Apocrophon
14-12-2016
So
a
is the number of adult tickets and
s
is the number of student tickets
a+s=180
$4a + $2.5s = $645
a+s=180
a=180-s
4a+2.5s=645
4(180-s)+2.5s=645
720-4s+2.5s=645
720-1.5s=645
75-1.5s=0
1.5s=75
s=50
a+s=180
a+50=180
a=130
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