A stretch of highway that is 12 1/4 long has speed limit signs every 7/8 of a kilometer.

12 1/4 divided by 7/8 = (49/4)/(7/8) = 49/4 * 8/7 = 56/4 = 14

There's also a sign at the beginning, so 14+1 = 15 total signs.

If you don't understand anything feel free to ask.

How many speed limit signs are on this stretch of highway?

For question 2.

each song is 3.5 minutes, slidshow 31.5, so we divide 31.5 by 3.5 and get 9.

9 songs.

If you don't understand anything feel free to ask. :)

Marcus is picking songs to play during a slideshow. The songs are each 3 1/2 minutes long.The slideshow is 31 1/2  minutes long.

How many songs will play in the slideshow?