Explanation for Question 7 From the Math (No Calc) Section on the Official Sat Practice Test 1
So thinking about question seven, we can see that it tells us that this 2 formula above right here, 3 um, it shows the monthly payment and that you need to pay off the 4 loan of P and they give us all the variables and then they want 5 to know which one gives P in terms of M R and N. 6 And so this language here gives P in terms of blank, 7 might be a little bit tricky and unfamiliar, 8 but all that they're saying is that they want you to solve for P. 9 So when they say gives blank, that's what they want you to solve for. 10 And then when they say in terms of M and N, 11 they're telling you that they want those variables in your other side of the 12 equation. So you'll notice that everything on the right side of the equation here 13 has those variables in it. 14 And so this might look tricky because there's a lot of numbers at play, 15 right? And a lot of variables. But if we look closely here, 16 all of these numbers and variables just make up one little fraction, 17 right? Well, not a little fraction, but they make up one fraction. 18 It's really not that different from just being X minus Y because all that 19 I need to do when I have a fraction is multiplied by what's in 20 the denominator and divide by what's in the numerator. 21 So if I take this and I'm multiply by what's in my denominator, 22 by both sides, then I would get one plus R over one, 23 comma, 2, 0, 0, race to the end, 24 minus one. And if I multiply by 25 that same thing here, right? 26 It's that one, plus R...