The function is graphed as shown below
Part A:
We use the formula

to find the vertex of the function. A quadratic function of the form of

and equating this form to the given function

, we have

and

.
Substituting

and

into the vertex formula, we have

, as shown in the graph
This calculation means that the highest profit is achieved when the number of photo printed equals to ten photos
Part B:
We can find solution to this equation by factorising





and

, as shown in the graph
The two values means that the company makes no profit when they either produce 5 or 15 photos
Answer:
0.42
Step-by-step explanation:
0.42857142857
Step-by-step explanation:
what concepts of functions can you associate with the picture
A20-a18=a1+19d-a1-17d=2d =281-97
so
d=92
He can ride his bike 105 km. 30/2 is 15. 15*7 is 105.
:D