A graph of a quadratic function is shown on the grid.
Which coordinates best represent the vertex of the
graph?
A (2.40)
B. (0-1)
c. (-0.4.0)
D. (1, -2)

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

Hurry which expression is equivalent to 3√x^5y?