Arestaurant has two appetizer specials. tomato bread costs $5.50, and stuffed mushrooms cost $6.75. the total amount in sales from the two appetizers on a friday night was $186.75. which equation can be used to represent x, the number of stuffed mushroom orders and y, the number of tomato bread orders?
a).5.5x + 6.75y = 186.75
b).6.5x + 5.75y = 186.75
c).6.5x + 5.5y = 186.75
d).6.75x + 5.5y = 186.75

the answer to this question is in the pic

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".