Chris spent half of his money on a pair of headphones. Then he spent half of his remaining money on CDs. Finally, he spent his remaining $13.00 on a book.

52

Step-by-step explanation:

you just have to take the 13 and work backwards, so double it to get 26 and then double 26 and youll get 52:)

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,