3. A deli sells small, medium, and large box lunches. Each can of soda costs $1 and each bag of chips costs $1. Each sandwich costs s dollars. Some customers buy box lunches, and some customers buy items separately. Use this and the information below to solve Parts A, B, and C. • Michelle buys 6 sandwiches and 2 sodas. Her total cost is 6s+ 2.

• Beyunka buys 6 small box lunches. These box lunches include 1 sandwich, 1 soda, and 1 bag of chips. Her total cost is 6(s + 2).

Duff buys 3 medium box lunches. These box lunches do not include soda. His total cost is 3(2s + 3).

3. PART A: Each medium box lunch purchased by Duff contains two sandwiches and three bags of chips. If sandwiches cost $7.75, what is Duff's total cost? ​

22

Stepby-step explanation:

Let represent the number of vanilla cupcakes=v

and the number of chocolate cupcakes=c

So, total number of cupcakes Mercedes bought = (v+c)

When she eats 1 vanilla cupcake

Number of vanilla cupcakes remaining=v-1

Number of cupcakes remaining=v+c-1

However;

   equation 1

If Mercedes instead eats two of the chocolate cupcakes

Number of chocolate cupcakes remaining=c-2

However

          equation 2

From equation (1)

      equation (3)

From equation(2)

      equation (4)

equating equation (3) and (4); we have:

Subtracting equation (3) from (4); we have:

-    

From equation (3); let's replace v=4 in order to solve for c

6(4) -c = 6

24 -c = 6

-c = 6 - 24

-c = - 18

c = 18

Total number of cupcakes Mercedes bought=v+c

=4+18

=22

55.50

Step-by-step explanation:

2(7.75)  = 15.5

15.5+3   = 18.5

3(18.5)   =55.5

$55.50