The value of y varies jointly with the values of x and z. when x=4 and z=9, the value of y is 360. what is the value of y when x=5 and z=12?

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,