It should open up because the a which is 4 is positive
The range is the interval of y values.
Smallest y values is -9 and the highest y values is 9.
So the range is
Is there a graph for this problem?
Answer:
https://newsela.com/read/lib-ushistory-roman-republic/id/27389/
Step-by-step explanation:
Answer:
15 miles
Step-by-step explanation:
Let
be the miles in the circular park path,
the time Louisa takes to finish and
the time Calvin takes to finish both in hours.
Then
, the longitude is equal to the velocity times the time used to finish. So


And the difference between Louisa's time and Calvin' time is 30 minutes, half an hour. So:

Three equations, three unknowns, the system can be solved.
Equalizing the equation with x :

In this last equation replace
with the other equation and solve:
With Louisa's time find x: