You would have to know the rate that it is going at to solve it I think
Area = 267
perimeter = 72
area- solve for the area of the 18 by 10 section, then the area of the 7 by 21 section. once you have those, determined the size of the shared area between those two and subtract from one of them.
perimeter- just add
W=2L
P=300=2(L+W)
so
300=2(L+W)
divide by 2
150=L+W
W=2L
subsitute
150=L+2L
150=3L
divide by 3
50=L
sub back
W=2L
W=2(50)
W=100
the field is 100yd wide by 50yd long
The price per gallon stays the same, so the relationship between the gallons put in and the money paid is the same and therefore, filling each car's tank with gas is proportional because they follow the same proportionality ratio
