HELP IN MATH!! What’s the slope???

Me, the vertices of quadrilateral coat are c(2,0), o(7,0), a(7,2) and t(2,2). prove that coat is a rectangle.

As a salesperson you get $50/day and $3.60/each sales you make.if you want to make $60 in one day, how many sales would you need need to make ? a 3b 4c 5d 6 show work.

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)