Asandwich store charges a delivery fee to bring lunch to an office building. one office pays $32 for 3 turkey sandwiches. another office pays $60 for 7 turkey sandwiches. how much does each turkey sandwich add to the cost of the delivery fee? explain using equations

Let us assume the cost of the delivery fee = $x.

And cost of each turkey sandwich = $y.

Cost of 3 turkey sandwiches including delivery fee = $32.

Therefore, we can setup first equation

x+3y = 32  (1).

Cost of 7 turkey sandwiches including delivery fee = $60.

Therefore, we can setup second equation

x+7y = 60  (2).

Subtracting first equation from second equation, we get

   x+7y = 60

- (x+3y = 32)

       4y = 28.

Dividing both sides, by 4 we get

4y/4 = 28/4.

y = 7.

Plugging y=7 in first equation, we get

x+3(7) = 32

x+ 21 = 32.

Subtracting 21 from both sides, we get

x+ 21-21 = 32-21

x = 11.

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".

step-by-step explanation: 2