Determine if the expression is a perfect square and if it is, factor it.
a2 – 8a + 16
a.
(a + 4)(a – 4)
b.
(4a + 1)2
c.
(a – 4)(a – 4)
d.
not a perfect square

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

The number if marbles of different colors stored in a hat is listed below: 4 red marbles 10 green marbles 7 blue marbles. without looking in the hat, dan takes out a marble at random. he replaces the marble and then takes out another marble from the hat. what is the probability that dan takes out a blue marble in both draws?