Bobby deleted 45 songs from his iphone. if the ratio the songs he deleted to songs he kept was 9: 10, how many songs he originally have on his iphone?

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)