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olsen6932
18.07.2019 •
Mathematics
What is the vertex of the graph y=x^2+4x-1
a. (1,4)
b. (0,-1)
c. (-1,-4)
d. (-2,-5)
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Ответ:
Option d. (-2,-5)
Step-by-step explanation:
we know that
The equation of a vertical parabola in vertex form is equal to
where
a is a coefficient
(h,k) is the vertex of the parabola
In this problem we have
This is the equation of a vertical parabola open up
The vertex is minimum
Convert the equation in vertex form
Group terms that contain the same variable, and move the constant to the opposite side of the equation
Complete the square. Remember to balance the equation by adding the same constants to each side.
Rewrite as perfect squares
therefore
The vertex is (-2,-5)
Ответ:
C) 92 DAYS
Step-by-step explanation:
V=S/t
t=?
S=48 360 000miles
V=22000mph
t=V/S