40 pages = 60 minutes
20 pages = 30 minutes
60 pages = 90 minutes
To do this question you can use proportions.
3/60 is simplified to 1/20.
This shows that if you study 1 hour you get a 20. So to find the answer you multiply each side by 4.5, this means that if you study 4.5 hours you get a 90.
Rebecca payed $35 for the video game, simple math.
-3 x -2 = 6
-3 + -2= -5
answer is -2