Question

Three cartons of juice cost $4.77? find the cost of 8 cartons

Answer 1

Note: Make the rule of three simple

cartoons __ price $
3 --------------- 4.77
8 --------------- y

Solving: (directly proportional)


`(3)/(8) = (4.77)/(y)`
Product of extremes equals product of means

`3*y = 8*4.77`

`3y = 38.16`

`y = (38.16)/(3)`

`\boxed{\boxed{y = 12.72}}\end{array}}\qquad\quad\checkmark`

Answer:
The price of eight cartoons was
`\$\:12.72`