Jars of peanut butter cost $2.50. The cost of buying varying amounts of jars of peanut butter is given by the equation () = 2. 50, where represents the number of peanut butter jars bought and represents the total cost. a. What is the cost of 4 peanut butter jars?
b. Why is -2 not in the domain?
c. Why is 5.5 not in the domain?

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150

the ratio of balloons to tables is 5: 2 and the constant variation is 5.

the equation is y=5x

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.