Afarmer has 9 2/5 acres of land. if he sells 1 1/3 acres to his neighbor, how many acres of land does he have left?

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,