A rectangular fence has an area of 72 square feet. Its length is six less than three times the width. What are the width and length of the fence?

Ineed with question three. i don't understand how i'm supposed to achieve 3 marks.

Right ∆abc has coordinates a(-7, 3), b( -7, 10), and c(-1, 3). the triangle is reflected over the x - axis and then reflected again over the y - axis to create ∆a'b'c'. which are the coordinates of vertex a'?

What is the answer to this problem? ignore the work. what is the correct answer?