Answer:
You have 45 cents that you picked out and put on the counter .
Answer:
D
Step-by-step explanation:
Answer:
Step-by-step explanation:
The general formula for a horizontal hyperbola :
![\frac{x^{2} }{a^{2} } -\frac{y^{2} }{b^{2} } =1](https://tex.z-dn.net/?f=%5Cfrac%7Bx%5E%7B2%7D%20%7D%7Ba%5E%7B2%7D%20%7D%20-%5Cfrac%7By%5E%7B2%7D%20%7D%7Bb%5E%7B2%7D%20%7D%20%3D1)
Given: a = 1 we know a² = 1 ,and that c = 9 so we know c² = 9² = 81
We also know that the relation between a, b, c for a hyperbola is c²= a²+b²
c²= a²+b², substitute what we know
81 = 1 +b², subtract 1 from both sides of the equation
80 = b²
The equation of our hyperbola is:
or ![x^{2} -\frac{y^{2} }{80} =1](https://tex.z-dn.net/?f=x%5E%7B2%7D%20-%5Cfrac%7By%5E%7B2%7D%20%7D%7B80%7D%20%3D1)