A30 foot board is cut into two pieces. how long is each piece if the second piece is 3 feet longer than twice the first piece

First piece would be 9 feet, second would be 21.

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,