27.33333333 I hope it helps!
For #6
x + y = -10
x - y = 2
First solve for y in one of the equations
x - y = 2
-y = 2 - x
y = -2 + x
y = x - 2
Now substitute into one of the equations and solve for x
x + y = -10
x + x - 2 = -10
2x - 2 = -10
2x = -8
x = -4
Answer:
16 days
Step-by-step explanation:
108/9 is 12. The late fee is 12¢ per day. 16x12 is 192.
Ellipse is your answer, because if you plug the equation into a graphing calculator and identify the conic, the term ellipse is given-