How many unique ways are there to arrange the letters in the word song?

The value √10 and √15 are plotted on the number line

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)