The sum of nine consecutive integers is 9. What is the smallest of these integers?

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

The center of a circle represent by the equation (x+9)^2+(y-6)^2=10^2 (-9,6), (-6,9), (6,-9) ,(9,-6)

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?