-12 + 18 = 70 - 64 or(-12+18)+(6*12)-2
Line up the decimal points and multiply the rest like you would normally do it but drop down the decimal at the end
Answer:
length x and width x-2
perimeter of rectangle=2[l+b]=2[(x-2)+x]=4x-4 is your answer
That would be the area of a circle of radius 12 miles
= pi r^2 = 452.4 square miles to nearest tenth.
