#2a
11x-2
#3a
y=4
#5
Choice 4
#2b
4t-4
#3d
3=s
#6
Choice 3
#1b
4.5
#10
p=1
#7
Choice 1
#2c
-2r+17
#11
x=-5
#8
#1c
-27
#13
100=250-28g
g=5.4 gallons
#9
Choice 2