Ateacher writes the following product on the board:
(7a-3)(2a-1)=14a^2+a-3
jose says that 2a+1 is a factor of 14a^2+a-3
amira says that 14a^2+a-3 is divisible by 2a+1
who is correct?

10 ! a train starts from grand city and travels toward belleville 388 miles away. at the same time, a train starts from belleville and runs at the rate of 47 miles per hour toward grand city. they pass each other 4 hours later. find the rate of the train from grand city.

In what organelle does photosynthesis take place?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?