Derek uses a $50 gift card to purchase 3 books for $12 each and a calendar for $9.what is the amount left on the card ?

Which one ? is the answer and how to find this answer

Which number line represents the solution set for the inequality - x 24?

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?