Pants cost $18.50 and it is 25% off, what is the cost?

What point is the projection of q on a) r b) s c) t

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?

Can someone show me step by step how to do this?