Answer:
(-5, -8)
Step-by-step explanation:
A. she needs 81sq ft
b. 202.5$
Try this option:
1. the sides of the biggest triangle are 16; x and √(16²-x²); the sides of the smallest triange are x;5 and y. The smallest triangle ~ the biggest triangle. Using the property of the similar triangles:

2. according to the Pyphagorean theorem (in the smallest triangle):

answer: y=√55.
This expression can't be factored with rational numbers.