The total cost of 30 identical erasers is y dollars. at this rate, what is the total cost in dollars of 70 of these erasers in terms of y

2 & 1/3 y
Lemme know if I was right :)

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's.