7. emma is planning a surprise party. she is considering using one of two venues. the banquet hall of hotel a will cost $862 for a reservation, plus $76 per dinner. the banquet hall of hotel b will cost $75 per dinner, in addition to $894 for the reservation. in order to make the best decision, emma figures out how many guests it would take to have the venues cost the same amount. what would the total cost be? how many guests would that be?

what's that

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".