Question

A, B and C are three points of a line. The coordinates of A and C are sqrt of 8 and sqrt of 32 respectively. If AB = BC what is the coordinate of B?

a) 2 sqrt 2
b) 3 sqrt 2
c) 2 sqrt 5
d) 2 sqrt 6

Answer 1

you want the midpoint between A and C

Answer 2

add the ends and divide by 2

Answer 3

i dont get it

Answer 4

sqrt(8) simplfies: sqrt(4*2) = 2sqrt(2) ; so A is out

.... you dont get how to do what, add? or divide?

Answer 5

the difficult part might be in the converting the ends into like terms that can be worked with

Answer 6

but the main impetus behind this is finding the midpoint.

Answer 7

ok

Answer 8

and?

Answer 9

and what?

Answer 10

i really dont know?

Answer 11

how would you simplify:

sqrt(32) ?

Answer 12

4 sqrt 2

Answer 13

good;

now we add 2sqrt2 and 4sqrt2; what do we get?

Answer 14

6 sqrt 2?

Answer 15

yes, now divide by 2

Answer 16

3 sqrt 2

Answer 17

tada!!

now what was the part that you "dont get"?

Answer 18

got it. thanks

Answer 19

youre welcome