9x^2-16y^2=
(3x+4y)(3x-4y)
Answer:
what?
Step-by-step explanation:
The Pythagorean theorem can be used for this.
.. (tip distance)² = (shadow length)² + (tree height)²
.. tree height = √((tip distance)² -(shadow length)²)
.. tree height = √((60 ft)² -(40 ft)²) = √(2000 ft²)
.. tree height ≈ 44.72 ft
So (m+n)/2= 7
To find m+n, multiply both sides by 2
m+n=14
Final answer: C
