Question

1) If a^b =x and x^b=y then

A)a^2b =y
B)a^b^2 =y
C)b^a=y
D)(ax)^b=y
E)(ax)^b=x

I got B?

2) If a and b are the coordinates of two points on the number line, then which of the following is equivalent to the statement that the absolute value of the distance from a to b is greater than the absolute value distance from -2 to 6.

A) lal > -2. l b l > 6
B) l a-b l > -8
C) la+2l > lb-6l
D)la-bl >8

I got D?

3) Everyone in Niko’s class has a different birth date. If Niko is the 8th oldest person and the 12th youngest person in his class, how many students were in his class?

I got 21 students

Answer 1

For #1 B is the correct answer :)

Answer 2

For #3 if you just count them...
1st oldest
2nd oldest
3
4
5
6
7
Niko (8th oldest, and 12th youngest)
11th youngest
10th
9th
8th
7th
6th
5th
4th
3rd
2nd
first youngest...
And count those lines you will see the number of students is not 21