A=adult tickets
c=chlderenticekts
s=sinior tickets
a=c
a+c+s=120
2a+s=120
total made is 1100
12a+6c+10s=1100
sub
a=c
12a+6a+10s=1100
add
18a+10s=1100
multiply first equation by -9 and add to other equation
-18a-9s=-1080
18a+10s=1100 +
0a+s=20
s=20
20 senior tickets were sold
answer is B
The answer is <span>20.4833333</span>
She will owe like 25% of the income so she will be paying somewhere around $12,814... Hope this helps and if it doesn't please tell me!
K=1.25 or 5/4
5k=k+5
-5k+k+5=0
-4K+5=0
-4K=-5
5/4=k