I need help w 1-3. geometry!!

Ten times the square of a non-zero number is eqaul to ninety times the number

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet

1/4x+5=3/4. i can't get access to the answer to this question! and, my request on "contact us" will not go