Difference=subtract sum=add. just answering so you don't waste points :-)
You would pay $1100.15 (rounded to nearest hundredths)(unrounded would be 1100.14875)
the perimeter is:
4(4x - 6)
Applying distributive property:
4(4x) - 4(6)
16x - 24
Then, the perimeter can also be represented by 16x - 24 because 4(4x - 6) can be simplified to 16x - 24
200=x-4 original equation
204=x addition property of equality (add 4 on both sides)
x=204 symmetric property