For all functions of the form f(x) = ax^2 + bx + c, which is true when b=0
1 answer:
Answer:
The y-intercept will always be the vertex of the function.
Step-by-step explanation:
The functions with the following form are quadratic equations and have a parabolic form, which means the have a vertex. The x coordinate of the vertex is given by the following expression
. When b is equal to zero, the vertex of the function will always be the y-intercept, therefore the correct answer is the third one.
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Using remainder theorem, we get:
Substitute t = 5 into the equation:
Thus, we get a remainder of 93 or (A)
Substitute t = 5 into the equation:
Thus, we get a remainder of 93 or (A)
We are given function: y=
Where, x is the number of hours after 5a.m.
We need to approximates the number of people standing in line to catch a commuter train at 7 a.m.
From 5 a.m. to 7 a.m. total number of hours = 7-5 = 2 hours.
So, we need to plug x=2 in the given function.
Plugging x=2 in , we get
Let us simplify it now.
2^2= 4.
Therefore,
= -20.524 + 63.642 - 3.333.
= 39.785 or 40 approximately.
Therefore, the number of people in line at 7 a.m. is approximately 40 people.
Option D.40 is correct option.