Answer:
a) Total number of Sandwiches and drinks purchased = x + y
b)The three possible solution to the given equation is
: (25,4), (20,8) and (15,12)
Step-by-step explanation:
Number of sandwiches in Lunch = x
Cost of each sandwich = $4
Number of Drinks in Lunch = y
Cost of each drink = $1.50
a) So, the total number of Sandwiches and drinks purchased in Lunch
= Number of sandwiches purchased + Number of drinks purchased
= x + y
or, the total number of Sandwiches and drinks purchased = x + y
Now According to the question:
4 x + 5 y = 120
To find possible pairs of solution take any arbitrary value for y .
Let y = 4, then 4x = 120 - 20 = 100
or, x = 100/4 = 25 ⇒ x =25
Let y = 8, then 4x = 120 - 420 = 80
or, x = 80/4 = 20 ⇒ x = 20
Similarly, for y = 12, x = 15
So, the three possible solution to the given equation is : (25,4), (20,8) and (15,12)
