Hi! I was doing quadratic and exponential word problems on Khan Academy, and got this…

Hi! I was doing quadratic and exponential word problems on Khan Academy, and got this. Is it possible that this type of problem will be on the SAT, and if it is, please explain it.

Question(reworded): A guy travels up a river at v mph for 2 miles. He goes the same distance back, but 5 mph slower than he did on the way up. If he spent 3 hours traveling up and back, which could be used to determine his speed on the way up the river?

a) 2v^2-13v+17=0
b)3v^2-15v-4=0
c)3v^2-11v+10=0
d)3v^2-19v+10=0

Hi! For page 120 question 8 in the pwn book, is there any other way to find the answer without using a Calculator?

Hi! For page 120 question 8 in the pwn book, is there any other way to find the answer without using a Calculator? I tried using a calculator but it took me a long time to find the answer. In addition, is there any other way to find that there is only one solution other than graphing or plugging the x values back into the equation?

Hi Mike! In SAT official test 1, Q 29 (in the math calculator section), how do you solve this problem?

Hi Mike! In SAT official test 1, Q 29 (in the math calculator section), how do you solve this problem? I don’t quite understand the explanation/concepts mentioned in the book.

29)For a polynomial p(x), the value of p(3) is -2. Which of the following must be true about p(x)?

A) x-5 is a factor of p(x).
B) x-2 is a factor of p(x).
C) x+2 is a factor of p(x).
D) The remainder when p(x) is divided by x-3 is -2.

(Also what does PWN stand for?)