Choosing a number from 1 to 20 and a color from 7 colors

Fundamental counting principle

What are the domain and range of the function? f(x) = -4 (sqrt)x

Find the vertex of the function given below y=x^2-6x+1

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules