Answer:
The vertex of the function is 
Step-by-step explanation:
Vertex of a quadratic function:
Suppose we have a quadratic function in the following format:

It's vertex is the point 
In which


Where

If a<0, the vertex is a maximum point, that is, the maximum value happens at
, and it's value is
.
f(x) = x² - X + 2.
Quadratic equation with 
So



The vertex of the function is 
For this case we have the following conversion of units:
Thus, applying the conversion of units we have:
Then, the distance traveled for 5 seconds is given by:

Answer:
he has completed 52 meters of the 80-meter race
It's would be plus haft that number (it's a negative) and the next number would be 0
Answer:
group A.)220/330
group B.)339/509
Step-by-step explanation:
2/3 of 330 is 220 therefore the people selected in group a to win $100 fuel cards will be 220/330
same thing for group B. 2/3 of 509 is 339 so the answer will be 339/509
(hope i helped:))