What is the common difference for this arithmetic sequence
45,40,35,30,25,...

Put the equation in slope intercept form by solving for y

Susie wants to take her friend out for lunch. she wants to spend $9.75 each person. how much will she spend in all.

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