Answer:

Step-by-step explanation:
center of the hyperbola is (0,0) = (h, k)
c = the distance form the center to either focal point = 100

The differences from the receiver to the transmitters = 2a
2a = 180 miles
a = 180/2=90 miles




The standard form is



Answer:
15 dollars.
Step-by-step explanation:
That would be 60% of 25
= 25 * 0.6
= 15 dollars.
Step-by-step explanation:
Points are (8,5) and (-12,-9)
The equation of a line passing through two points is given by :

or

But he writes the equation 7x – 10y = 3 which is not matching with the one we have calculated. It means that model calculated by Devon is not good.