The sweater cost is on sale. The sweater on sale cost $58.
The sweater was only 70% of the original cost. What was the
original cost of the sweater?

$82.86

Step-by-step explanation:

Let initial cost be K

so 70% of K = 58dollars

70% of K = 0.7×K

0.7×K=58

(divide both side by 0.7)

K=58÷0.7

K=82.86 dollars (approx)

answer. d.289 hope that

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.