R a t e me 1-10 . :)

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

Secant be and cf intersect at point d inside a what is the measure of cde

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?