Round your answer to the nearest whole dollar

Square a has a side length of (2x-7) and square b has a side length of (-4x+18). how much bigger is the perimeter of square b than square a?and show all work! you so

Can someone tell me if these are correct?

Lines d, e, and f are parallel. that means they have the same slope. each of these lines has a slope of -3. enter numbers to complete an equation fir each line