Answer:
use the pythagoras theorem
Step-by-step explanation:

The first equation is 
(Equation 1)
The second equation is
(Equation 2)
Putting the value of x from equation 1 in equation 2.
we get,


by simplifying the given equation,


Using discriminant formula,


Now the formula for solution 'x' of quadratic equation is given by:


Hence, these are the required solutions.
I believe that is 275 because percent is just out of one hundred
The answers is D 21,000because you have to do 60,000x.35=21,000