The perimeter is 320. Just multiply 80 times 4
K=19 which would leave the equation 181=181. The first step to solving this is subtracting 9k from each side.
after you do that it should be k-9=10
now you add 9 to both sides leave k=19. plug k into the equation and get 181=181
A.would be 50 cents and im not entirely sure about b but i think its 8
Lynn age: 7x+2. That's if you wanted an equation.