Answer:
and 
Step-by-step explanation:
when you solve for r in the given equation, you need to apply the square root property, which gives positive and negative answers (both should therefore be considered):

then you need to include these two possible solutions:
and 
Answer:
Step-by-step explanation:
805/38= 21 7/38
So that is 21 full payments of $38.00 and one of $7.00
Answer:

Step-by-step explanation:
Find dy/dx of the ellipse
at (2,3)
Using Implicit Differentiation
Differentiate both sides of the equation with respect to x


isolate the term dy/dx


Evaluate at point (2,3)
For x=2, y=3


Answer: 2/7
Step-by-step explanation: