Explanation for Question 5 From the Math (No Calc) Section on the 2020 March Sat
So number five tells us that bill is planning to drive 1000 miles 2 to visit his family. And if he drives 250 miles per day, 3 where each of the following represents the remaining distance D in miles, 4 that bill will have to drive, um, 5 for N days. Right? So one of the main things that we can do 6 here first is assign what our variables are. 7 We know we have N and we know we have D and the question 8 tells us the N is the number of days that bill drives. 9 So N is days, and then D is 10 distance, right? The remaining distance. 11 So that's important. It's not the distance that he's gone, 12 but it's the distance that's left over. So distance remaining, 13 perhaps this is really useful to do for this question, 14 because you see the N is days, 15 and you might get that switched up thinking that D is days, 16 but here are two variables. 17 And so that's a great place to start, right? And we know that everything 18 is solved for D so really what's happening here is they're asking us, 19 how can I figure out how much distance bill has remaining at any point 20 in the trip? Right? So the first thing we can do is ask ourselves, 21 what is, Bill's starting point, how many miles does he have to go before 22 he started driving? What is the total distance? 23 And we know that that's a thousand, right? And we would expect that as 24 he drives the distance between him and his family is going to get 25 smaller, right? So we're subtracting miles as he drives along. 26 Since we're losing...