NEED HELP MY GRADE DEPENDS ON IT

Find the equation using the point (4,8)

Credit card a offers an introductory apr of 3.4% for the first three months and standard apr of 15.7% thereafter,

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?