Explanation for Question 3 From the Math (Calc) Section on the Official Sat Practice Test 9
Question three access. If two, 2 an over five is equal to 10. What is the value of two N 3 minus one? So to solve this let's first solve for two 4 N or just N. So we have two, 5 an over five is equal to 10 multiplying both sides 6 by five. The fives will cancel out on the left-hand side and we're left 7 with two N is equal to 10 by five, 8 which is 50. So dividing both sides by two, 9 we get and is equal to 25. 10 And now we're asked to value of two and minus one. 11 So two times N minus one is equal to two 12 times 25 minus one. 13 So that's going to be 50 minus one is equal to 49. 14 So you can pick answer choice.