7. At an ice cream parlor, ice-cream cones
cost dollars each and sundaes costy
dollars each. The total cost of 4 cones
and 3 sundaes is more than $20. The total
cost of 5 cones and l sundae is less than
$16. This situation can be represented by
the following system of inequalities.
Sex + 3y> 20
5x + y< 16
Which of the following is not possible?
A The cost of I sundae is $4.00
B The cost of 1 ice-cream cone is $2.50.
C The total cost of 1 ice cream cone
and l sundae is $5.00.
D The total cost of l ice cream cone
and 1 sundae is $8.00.
10