What is obama's last name

Which shows the pre image of triangle xyz

Aubrey read 29 books and eli read 52 books what number is equal to the number of books aubrey read?

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?