What is the vertex of the parabola y=-x^2+4x-5

Vertex= ( , )

Ans: (-2, -9)

Explanation:

x-coordinate of the vertex:

x

=

(

−

b

2

a

)

=−42=−2y-coodinate of vertex: y=f(−2)=(−2)2+4(−2)−5=4−8−=−9

Step-by-step explanation:

Barb wants to divide the days in a year by a number.

Step-by-step explanation:

The given expression is  [365 divided by y], where y be any arbitrary number.

The given expression has numerator as 365 and denominator as y which can be any number.

We know that , the number of days in one year = 365

Hence, from the given option the right scenario which could be represented by the algebraic expression is "Barb wants to divide the days in a year by a number.

"