The technical probability of rolling any number on a standard die is 1/6 because there's six numbers. Based on that, since he rolled a "4" on 5 tosses, it seems likely that it's 30 times, because 1/6 of 30 is 5. I haven't done probability in awhile but if I remember correctly that should be right
Don’t let R confuse you as it stands for Reflection. In this question you want to do a reflection across the y-axis.
The formula for reflection across the y-axis is (-x,y). In meaning as you cross the y-axis you y-value will always stay the same while your x-value with the opposite of what it is currently.
With that being said you want to plug in your values from point P to the formula which will leave you with (-4,7)
