the sum of the speeds of two trains is 724.1 miles per hour if the speed of the first train is 11.9 miles per hour faster than that of the second train find the speeds of each ​

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,

the answer is 40.

proof:

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative