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

proportions are fractions that equal to each other. so if two fractions are the same, they are proportional.

let's check the answers to see if they are proportional.

question a is not proportional because you can't turn 1.5/3 to 3/9. if you try to multiply 1.5/3 by 2 or 3, you wont get 3/9. it's impossible to make the fractions the same.

question b is not proportional because you can't turn 22/33 to 4/6. 33 can't go into 6.

question c is proportional because when you multiply 2 and 3 by 71, you would get 142/213, and those fractions equal to each other

question d is proportional because when you divide 14 and 7 by 2, you would end up with 7/3.5, and those fractions equal to each other.

4.28095238095 that is the answer