There are several large bowls containing various amounts of tangerines on a table. When 12 of the bowls each had 8 more tangerines added to
them, the mean (average) number of tangerines per bowl increased by
6. How many bowls of tangerines are on the table?

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?