Natalie had x amount of money. She buys a total of $77 worth of food from the grocery store. what variable expression represents the amount of money she had left.

The diagram shows the lengths of corresponding sides of similar triangles a'b'c' and abc. which expression gives the perimeter of a'b'c'? a. 4(4 + b + c) b. 2(a + b + c) c. 4(a + b + c) d. 8(a + b + c)